Git: Set a title for change selection dialog

Lost in 13a0b348

Change-Id: Id798c849cd30c44db1e16d14ddfba4c78a77e2f2
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>

src/plugins/git/changeselectiondialog.ui

@@ -10,6 +10,9 @@
     <height>350</height>
    </rect>
   </property>
+  <property name="windowTitle">
+   <string>Select a Git Commit</string>
+  </property>
   <layout class="QGridLayout" name="gridLayout">
    <property name="sizeConstraint">
     <enum>QLayout::SetDefaultConstraint</enum>