message: Fix pixel history context menu not appearing
diff: @@ -51,7 +51,7 @@ Right click to debug an event, hide failed events, or jump to the modification's
  <item>
  <widget class="RDTreeView" name="events">
  <property name="contextMenuPolicy">
  - <enum>Qt::PreventContextMenu</enum>
  + <enum>Qt::CustomContextMenu</enum>
  </property>
  <attribute name="headerMinimumSectionSize">
  <number>16</number>
  