Debugger: Go back to plain QTreeView for tooltips
Debugger: Go back to plain QTreeView for tooltips

Nothing of the BaseTreeView functionality is used, and there seems
to be a off-by-1 in column width computation leading to unnecessary
eliding.

Change-Id: I4426070742801864edfdba4c912ad8cc8a15f7bb
Reviewed-by: Christian Stenger <accbb51712d7b9c4fb108439d01e716148e5f9e6@theqtcompany.com>

Distrotech/qtcreator,xianian/qt-creator,Distrotech/qtcreator,danimo/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,xianian/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,Distrotech/qtcreator,kuba1/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,kuba1/qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,danimo/qt-creator,xianian/qt-creator,danimo/qt-creator,xianian/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,danimo/qt-creator,kuba1/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,danimo/qt-creator,danimo/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator