Completed redesign of doc viewer details panel

nw/core/options.py

@@ -77,7 +77,7 @@ class OptionState():
                 "headerOrder",
                 "columnWidth",
                 "columnHidden",
-            ])
+            ]),
         }
 
         return

nw/core/project.py

@@ -579,6 +579,7 @@ class NWProject():
     def closeProject(self):
         """Close the current project and clear all meta data.
         """
+        self.optState.saveSettings()
         self.projTree.writeToCFiles()
         self._appendSessionStats()
         self._clearLockFile()