Git: Fix showing commits from rebase-todo editor

We used to need the repository root in order to resolve the file.

This is no longer needed, since the raw patch is parsed instead.

Change-Id: Ifdbbcd686a5ef7bbbd472f37b20190b9e9abebe7
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/git/gitclient.cpp

@@ -369,11 +369,8 @@ GitDiffEditorReloader::GitDiffEditorReloader(QObject *parent)
 
 void GitDiffEditorReloader::reload()
 {
-    const QString workingDirectory = m_diffType == DiffShow
-            ? m_gitClient->findRepositoryForDirectory(m_workingDirectory)
-            : m_workingDirectory;
     GitDiffHandler *handler = new GitDiffHandler(diffEditorController(),
-                                                 workingDirectory);
+                                                 m_workingDirectory);
     connect(handler, SIGNAL(destroyed()), this, SLOT(reloadFinished()));
 
     switch (m_diffType) {

src/plugins/vcsbase/vcsbaseplugin.cpp

@@ -750,6 +750,7 @@ static const char SOURCE_PROPERTY[] = "qtcreator_source";
 void VcsBasePlugin::setSource(Core::IDocument *document, const QString &source)
 {
     document->setProperty(SOURCE_PROPERTY, source);
+    VcsBasePluginPrivate::m_listener->slotStateChanged();
 }
 
 QString VcsBasePlugin::source(Core::IDocument *document)