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to be used on the new target setup page

loadProject did mostly the same as openProject. So it can be removed.
(Also the error handling was wrong too.)

In that mode the lineedit is readonly and the browse button is
disabled. To be used in the new targetsetuppage

Existing Directory checks for whether the directory exists, which
Directory does not. Also changes all existing PathChoosers from
Directory to ExistingDirectory as that does not change behaviour.

Make the internal data structure a map from id to Version, simplfing a few
functions. Return sorted lists, with newer versions in front for various
functions, e.g. validVersions(), versionsForTargetId.

To be used on the new targetsetuppage

Reviewed-by: Christian Kandeler

Reviewed-by: Christian Kandeler

Can be overridden by setting the environment variable maually.

Add a string-list type property specifying the version argument
for command type Path Choosers. Use it prototypically in
GccToolChainWidget.
Rubber-stamped-by: Tobias Hunger <tobias.hunger@nokia.com>

rename BastTextEditor->BaseTextEditorWidget, BaseTextEditorEditable->BaseTextEditor
rename BaseTextEditor{,Widget} subclasses
rename editableInterface->editorInterface
rename createEditableInterface->createEditor
minor cleanups after renamings

Task-number: QTCREATORBUG-3803

Refactor ToolChains in Qt Creator:

 * Allow for several toolchains of the same type
 * Be smarter wrt. guessing what kind of output a toolchain
   produces. This allows us to eventually handle e.g. embedded
   linux setups way better than before.
 * Be smarter wrt. guessing what kind of environment a Qt version
   needs.
 * Improve auto-detection of toolchains a bit
 * Decide on which debugger to use based on the kind of output
   produced by the compiler.
 * Add options page to configure toolchains
 * Remove toolchain related options from the Qt version dialog

Reviewed-by: dt

Update screenshots

With some refactorings to make the code look better.

Reviewed-by: con

Extend text editor tooltips by a 'widget content', making
it possible to show any widget utilizing the fact that the
QTipLabel actually is a frame (and thus a container).
Introduce concept of 'interactive' tooltips and modify
the tooltip-closing mechanism such that simple interaction
is possible. Emit the base text editor's tooltip signals
with the correct position and add API to calculate the tooltip
position from the cursor position.
Add API for pinning tooltips to the text editor (by removing
them from the QTipLabel layout).
Modify the Debugger's tooltipmanager not to manage tooltips
under TextEditor control and to take over control only once
tooltips are pinned.
Rubber-stamped-by: Leandro T. C. Melo <leandro.melo@nokia.com>

Make it possible (again) to compile qmlobserver in share/qtcreator.
However, build artifacts in there might result in a malfunctioning
qtc-qmlobserver!

Reviewed-by: Thorbjorn Lindeijer

Fix a potential crash when accessing their nodes.

There seems to be no reason not to allow this outside of the observer
mode.

Reviewed-by: Tobias Hunger