Debugger: Move some tooltip model code out of treeview
Debugger: Move some tooltip model code out of treeview

Closer to the usual pattern.

Change-Id: Iee0f095a59755424bd2e494aaa89215669d02972
Reviewed-by: Christian Stenger <accbb51712d7b9c4fb108439d01e716148e5f9e6@theqtcompany.com>

martyone/sailfish-qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,Distrotech/qtcreator,danimo/qt-creator,xianian/qt-creator,xianian/qt-creator,danimo/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,danimo/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,danimo/qt-creator,danimo/qt-creator,xianian/qt-creator,danimo/qt-creator,danimo/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,Distrotech/qtcreator,xianian/qt-creator,danimo/qt-creator