Allow to do codefolding on files and hunks in the diff editor

Also introduce a indirection, modes have now types, edit and debug have
the same type, and editors do have a prefered type of modes instead of a
prefered mode.

That fixes the bug that if the prefered qml editing mode was set to
design, then in switching between qml editors would
- in Edit Mode: stay in edit mode
- in Debug Mode: switch to debug mode

The function always switched to Edit Mode, which was the cause for
several bugs. Since openEditor() already does switch to the right mode,
the function is not really needed.

The following actions now respect the prefered mode of the editor:
"f file"-locator
The Open Documents list
Editor history navigation

... for git, hg as it is not obvious from the SHA1 displayed.

in VCSBaseEditor  and BaseTextEditor::createNew to the size
used for limiting file size.

Reviewed-by: Robert Loehning <robert.loehning@nokia.com>
Task-number: QTCREATORBUG-1847

A mostly mechanical change.

Reviewed-By: con

Make VCS-generated editors read-only, enable editing
when opening a patch.
Make VCS-Editor non-read-only by default, add setter
for "Forced read-only" that makes it a temporary,
read-only file.

Task-number: QTCREATORBUG-1528
Reviewed-by: Thorbjorn Lindeijer <thorbjorn.lindeijer@nokia.com>

Merge managesDirectory() and findTopLevelForDirectory()
into one giving managesDirectory() an optional topLevel
parameter. This removes the need to go up the directory
hierarchy twice when checking for Merurial or git and also
saves some checks for CVS/Subversion.
VCSManager: Check cache in reverse order starting out with
the full path first to improve handling of nested repositories.
Rubber-stamped-by: con
Acked-by: dt

Reviewed-by: Friedemann Kleint

doing it in 1.3 as well to avoid possible later conflicts

They were no longer showing e.g. the file name of the diffed file.
Also separate editor id and editor context a bit.

Reviewed-by: thorbjorn

Reviewed-by: Friedemann Kleint

  * Use id() for methods returning a string used to represent
    some type of object.
  * Use displayName() for strings that are meant to be user
    visible.
  * Quieten some warnings while touching the files anyway.
  * Move Factories to their products in the plugins where that
    was not done before.

Reviewed-by: dt

Task-number: QTCREATORBUG-503

...over change numbers. Add missing "Log project/repository"
actions and log count limits.
Task-number: QTCREATORBUG-503

in annotation editor, including base infrastructure in
VCSBaseEditor. Pass signals of VCSBaseEditor to opaque
VCSBaseEditable (IEditor) for convenience.

Task-number: QTCREATORBUG-503

Make the diff-base directory a property of VCSBaseEditor and use
everywhere.

Remove logic handling several repositories.

Fixes:
- Cannot diff a file that does not belong to a project
- Cannot commit when a temporary diff/log view is open
  due to the current file pointing to a temporary directory
- git's project-related actions not passing the correct
  relative path.

Implementation:
- Centralize code to listen for Qt Creator's relevant state changes
  in VCSBasePlugin, dispatching the changes to the instances affected.
  (avoiding multiple invocations of searches/QFileInfo on current).
- Do the same for the corelistener catching closing SubmitEditors.
- Introduce VCSBasePluginState representing the relevant state
  (current file/project).
- Call git with working directory set and relative arguments
- Remove setEnabled/isEnabled() logic of IVersionControl
- Pass toplevel from VCSManager to avoid duplicate searches.

and ApplicationRunConfiguration to LocalApplicationRunConfiguration,
preparing remote debugging. Change the interface canRun() to be const,
run() to create() (since it does not run anything), use references
to the QSharedPointer<Foo>. Introduce d-Pointer and remove
unneeded headers from ProjectExplorerPlugin and add missing includes
everywhere.

Reviewed-by: Trust Me

Conflicts:

	src/libs/cplusplus/CppBindings.cpp
	src/libs/cplusplus/CppBindings.h
	src/libs/cplusplus/FastPreprocessor.cpp
	src/libs/cplusplus/FastPreprocessor.h
	src/plugins/cpptools/cppcurrentdocumentfilter.cpp
	src/plugins/cpptools/cppcurrentdocumentfilter.h
	src/plugins/cpptools/cppsemanticsearch.cpp
	src/plugins/cpptools/cppsemanticsearch.h
	src/plugins/duieditor/parser/qmljs.g
	src/plugins/duieditor/parser/qmljsast.cpp
	src/plugins/duieditor/parser/qmljsast_p.h
	src/plugins/duieditor/parser/qmljsastfwd_p.h
	src/plugins/duieditor/parser/qmljsastvisitor.cpp
	src/plugins/duieditor/parser/qmljsastvisitor_p.h
	src/plugins/duieditor/parser/qmljsengine_p.cpp
	src/plugins/duieditor/parser/qmljsengine_p.h
	src/plugins/duieditor/parser/qmljsgrammar.cpp
	src/plugins/duieditor/parser/qmljsgrammar_p.h
	src/plugins/duieditor/parser/qmljslexer.cpp
	src/plugins/duieditor/parser/qmljslexer_p.h
	src/plugins/duieditor/parser/qmljsmemorypool_p.h
	src/plugins/duieditor/parser/qmljsnodepool_p.h
	src/plugins/duieditor/parser/qmljsparser.cpp
	src/plugins/duieditor/parser/qmljsparser_p.h
	src/plugins/duieditor/parser/qmljsprettypretty.cpp
	src/plugins/duieditor/parser/qmljsprettypretty_p.h
	src/plugins/duieditor/rewriter/rewriter.cpp
	src/plugins/duieditor/rewriter/rewriter_p.h
	src/plugins/duieditor/rewriter/textwriter.cpp
	src/plugins/duieditor/rewriter/textwriter_p.h
	src/shared/cplusplus/ASTClone.cpp
	tests/manual/cplusplus/main.cpp

Reviewed-by: Trust Me

Reviewed-By: con

Reviewed-by: Daniel Molkentin <daniel.molkentin@nokia.com>

Allows navigating the code using the mouse when pressing Ctrl. Suggested
a few times and also seen in other IDEs.

Task:     240811

Fixes: Add a combo for diff file browsing, bring diff editors to front, exclude qconfig.pri from files examined by p4.

Task: 234842

Many singletons have their own instance() method, in which case there is
no need to use ICore::instance() to get access to them.

replace ExtensionSystem::PluginManager::instance()->getObject<Core::ICore>() by Core::ICore::instance()