String update as suggested by Leena.

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

Task-number: QTCREATORBUG-1642

Update 'Commit' button to show number of files to be committed.
Task-number: QTCREATORBUG-2090

A mostly mechanical change.

Reviewed-By: con

Task-number: QTCREATORBUG-1577

Task-number: QTCREATORBUG-1577

..for timeout handling to take effect. Also,
log window will update continuously.

Task-number: QTCREATORBUG-777

Reviewed-by: ossi

Fix breakage introduced by:
59237338

Modify CodePaster::fetch to do a mimetype detection on the
content, create a filename with the matching extension and
open that file.
This gives correct syntax highlighting  and makes "Save as"
more convenient. Keep the file around and delete on exit.

Modify patch mimetype with some content detection (higher priority
than C++).

Add a "current patch file" to the VCSBasePlugin::State. Add "Apply
patch" to git with whitespace fix.

Static leaks, but causes noise in valgrind output. :)

Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

Create actions with convenient factory functions, do enabling per
file/project/repository centrally.

in the same fashion as "Clean repository".

Present user with a checkable list of files to be cleaned (add reusable
dialog to VCSBase module).

And port the Qt4ProjectManager to use that API for synchronization
between editors and the .pro file tree.

Reviewed-By: con

Make it possible to trigger actions from the locator bar by
registering an instance of Locator::CommandLocator by prefix.
Currently used for VCS systems.

Acked-by: con
Initial-patch-by: Roberto Raggi <roberto.raggi@nokia.com>

Give dialogs a consistent look, set
WA_DeleteOnClose on them and improve updating.
Add a Refresh/Diff buttons to branch dialog.

Add non-modal stash management dialog and additional menu option
"Stash snapshot..." to stash away changes prompting for a description,
which will immediately replay the stash (take snapshot and continue
working).
Add interface to IVersionControl for creating/restoring/deleting
snapshots for backup/complex undo operations (currently supported
by git only). Add test options to VCSBasePlugin.
Clean up and extend git client accordingly.

Add repository creation operation to IVersionControl, implement for hg
and git, add convenience slot with prompts to VCSBasePlugin.
Add respective menu options and make menus are visible in case no VCS is
active.
Change project wizards extension page to list VCS that are capable of
repository creation in a QComboBox in case the directory is not managed
by another VCS (in which case it lists that one for operation 'add').
On that occasion, polish the Project selection to use a QComboBox as
well and add some smartness to find the most suitable project to add via
path matching.

Reviewed-by: Friedemann Kleint

Task-number: QTCREATORBUG-503

Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

Make checkscript a bit more verbose.

Task-number: QTCREATORBUG-451
Task-number: QTCREATORBUG-422

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.

Add changed signals to IVersionControl and
VCSManager and wire them to the update methods. Add a menu action for
manually updating. Improved version of reverted
7aa24116.

Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

This reverts commit 7aa24116.
It breaks the code model updates completely. So reverting this change
until we have the right thing.

Reviewed-by: Roberto Raggi