Vcs: Find better line-number to scroll annotate output to
Vcs: Find better line-number to scroll annotate output to

Use new TextEditorWidget::firstVisibleLine, etc. methods to find
a better line to center on.

Task-number: QTCREATORBUG-14230
Change-Id: I36424fcd1200d362d06c456e7b4c13e671dbd4b6
Reviewed-by: Tobias Hunger <012f8d714267bccc9d4766fbeace9f175fcc70c4@theqtcompany.com>

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