The mouse wheel should not hide the QuickToolBar

That is, we don't look at the column position anymore when searching
the function under cursor.

This reverts commit c2e70112.

qtoptionspage.cpp will set the icons, anyway.

Task-number: QTCREATORBUG-1876

Reviewed-by: dt <qtc-committer@nokia.com>
Task-number: QTCREATORBUG-125

 * Report what kind of build we have in the tooltip
 * Create only debug/release configuration for debug/release
   configured directories
 * Create debug and release configuraions for debug_and_release
   configured directories
 * Add debug_and_release to options in QMakeStep UI
 * Do not add CONFIG+=debug/release to CONFIG+=debug_and_release builds

Reviewed-by: Tobias Hunger

Otherwise, if the project file does not already end in a newline,
we'd introduce syntax errors.

Remove unneeded methods from API.

Reviewed-by: Tobias Hunger

Reviewed-by: ck

(Else, we do do not have enough time to start the observer)

Do the same as in CppOutline

Application logic implemented. The Wizard Ui does not expose
this feature, yet.