* adjusted some help texts
* moved exclude paths and source file extensions contents to indexed paths selection in project setup wizard
* removed compiler flags from CDB project setup wizard
* added wizard content that shows some info text regarding the purpose of source groups
* renamed ContentSummary to ContentGroup
* fixed issue with CompilationDatabase include path extraction
* Turned QtProjectWizzard into window for Source Group ui
* Clicking into FilePicker when empty will open dialog right away
* Fixed environment variable use throughout all Source Group path values
* Moved Preferences to QtPreferencesWindow
bug id = 230
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* project can not have multiple source groups with different types
* language of a project is now inferred from source groups
* setting global NameHierarchy delimiter of first sourceGroup in project
* added project settings migrations for source groups
* Add Settings Migration classes (MoveKey, DeleteKey, Lambda)
* Update sample projects with migrations
* added method to config to retrieve sublevel key names
* implemented recursive removing of keys in settings
* moved project files out of top level
* removed solution parsing code as it is not used anymore
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* revised texts in project setup ui
* fixed crash during project setup when CDB file is empty
* fixed row height of project location in CDB project setup
* changed help texts
* use help buttons instead of descriptions in dialogs
* fixed show files button not up-to-date with directory list box
* fixed source file extensions shown in cdb setup
* refactored size and content setting for project content classes
* Added class QtTextEditDialog for displaying text content
* Added edit button to QtDirectoryListBox
* Replaced show files button dialog using QtProjectWizzardContentSourceList with QtTextEditDialog
* Added language specific Project and ProjectSettings
* moved project specific code from Application to Project
* made Application a singleton
* added handleDialog method to Application which displays a dialog window and waits for user input
* Added ScopedFunctor that executes a function when deleted
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