Insert a colon (fix)
Add ToolTipRole for sidebarmodel (currently broken)
Delete MixxxUtils and stick the duration string formatting in util/time.h.
Move CircularBuffer to util/.
Move Singleton to util/.
Fix ambiguity.
Display a tooltip only when the node is not a root
Renamed MixxxApp to MixxxMainWindow.

This is required, because we need to inherit a new class from QtApplication
later. A MixxxApp Inherited from QMainWindow is confusing.
Removed unused crashDlg()
Made loadTranslations a private member of MixxMainWindow; Fix some MixxxApp left overs.
Moved MixxxMainWindow Constructor and destructor to the top of mixxx.cpp
Some coding style fixes
wslidercomposed: made some functions protected and added virtual keyword
Perform a type check before casting to TreeItem*
Display the name for the Quick Links node
fix modplug support

Fix build error due to passing a const pointer to modplug read function.
Fix UI baseclass (QWidget instead of QDialog)
Fix UI size behavior for ModPlug Decoder Preferences.
Remove superfluous tabstops that were giving warnings.

Signed-off-by: Stefan Nuernberger <kabelfrickler@gmail.com>
Merge pull request #159 from snue/feature/modplug

fix modplug support
Merge pull request #158 from badescunicu/sidebar_tooltips

Sidebar tooltips [Bug #1017034]