VCS: Add "Open file" context menu action to VCS log pane

to be used for status/opened output. enabling convenient opening.
Append repository as block data to log text to be able to resolve
relative paths.

src/plugins/subversion/subversionplugin.cpp

@@ -748,7 +748,10 @@ void SubversionPlugin::projectStatus()
     QTC_ASSERT(state.hasProject(), return);
     QStringList args(QLatin1String("status"));
     args += state.relativeCurrentProject();
+    VCSBase::VCSBaseOutputWindow *outwin = VCSBase::VCSBaseOutputWindow::instance();
+    outwin->setRepository(state.currentProjectTopLevel());
     runSvn(state.currentProjectTopLevel(), args, m_settings.timeOutMS(), true);
+    outwin->clearRepository();
 }
 
 void SubversionPlugin::describe(const QString &source, const QString &changeNr)