Reviewed-by: Roberto Raggi

RevBy: con

This stuff was all over the place, a relic from before the editor
settings were unified. Now the initialization is only done in
TextEditorSettings.

Fixes the .pro file editor and the generic project files editor, which
before only used the font settings.

I couldn't find it since it was both hidden in the cppplugin.cpp file as
well as having an unnecessarily long name.

Didn't add anything to the TextEditorActionHandler.

Need to call into the superclass in order not to lose functionality. Was
missing in the wizard, hence the many missing occurrences.

Reviewed-by: Friedemann Kleint

Introduce setCodeFoldingSupported to the BaseTextEditor, and only
enabled it for the C++ and QtScript editors. This removes the useless
margin meant for code folding markers from the plain text editor and
.pro file editor.

Task:     248199

Task:     247606
RevBy:    analysis and bug fix mostly by ossi
Details:  More fixes might be needed.

Task:     248454

Task:     Found while testing the cmake plugin
Details:  Don't validate the working directoryl as it depends on the
magic $BUILDDIR variable, validate the executable as a command.

Task:     246812

Task:     248084

Reported on irc, and probably also have a task for that. Simply
forgotten when i first implemented it.

DebuggerInferiorStopped without going through DebuggerInferiorStopRequested

Task:     Reported on irc
RevBy:    mae

Task:     248067
Details:  Use --no-color where appropriate. Use a hack to remove color sequences from output for "status" since it does not support the option as of git 1.6.2.

Details:  Move that code from qt4project to a common class.