Move the project index into the project class

novelwriter/gui/outlinedetails.py

@@ -58,7 +58,6 @@ class GuiOutlineDetails(QScrollArea):
         self.theParent  = theParent
         self.theProject = theParent.theProject
         self.theTheme   = theParent.theTheme
-        self.theIndex   = theParent.theIndex
         self.optState   = theParent.theProject.optState
 
         # Sizes
@@ -283,9 +282,10 @@ class GuiOutlineDetails(QScrollArea):
         """Update the content of the tree with the given handle and line
         number pointing to a header.
         """
+        pIndex = self.theProject.index
         nwItem = self.theProject.projTree[tHandle]
-        novIdx = self.theIndex.getNovelData(tHandle, sTitle)
-        theRefs = self.theIndex.getReferences(tHandle, sTitle)
+        novIdx = pIndex.getNovelData(tHandle, sTitle)
+        theRefs = pIndex.getReferences(tHandle, sTitle)
         if nwItem is None or novIdx is None:
             return False