* switch back to snippet view with snippet button in file title bar
* use new title bar widget in single view as well
* restore view mode on undo, store current view mode for every message id (added id to message)
* treat view mode switch as adapt message on undo stack
* fixed crash after snippet expansion
* fixed hatching in file title not shown
* add inheritance edges between parents of active symbol and other visible symbols
* add dashed inheritance edges when symbols are no direct decendants
* inheritance edges are also respected in layouting, putting base/derived classes in the correct top/bottom spot now
bug id = 167
* faster hierarchy cache building
* cache symbol definition kinds
* don't request files when caches can be used
* save SearchEdge by starting character in SearchNode to avoid iteration when adding to SearchIndex
* fixed disabled state of some search buttons
* Show font size change as number not percent
* Show current graph zoom in label next to zoom buttons
* Fixed search blocks not properly updated when fonts size changes
* Use unified showCodeSnippets method for setting file information on CodeView
* Made async initial file and snippet expansion synced
* Add ScrollParams API to CodeView
* Regard scope size when scrolling to definition
* Only use QtThreadedLambdaFunctor in QtCodeView now
* NameHierarchy now looks like this: <delimiter>\tm<all the rest>
* made new baseclasses for SettingsMigration and SettingsMigrator
* Use the migration system for SqliteBookmarkStorage as well
* holding down back or forward button shows list of current back-forward stack
* added narrow button between back and forward to show the list
* added History menu
* moved back and forward actions to History menu
* show chronological list of recently active symbols in History menu
bug id = 151
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* Store MessageActivateTokens instead of original view messages
* Renamed FeatureController to ActivationController
* Remove all non-activation messages from undo redo stack after reindexing project
* Added MessageShowReference to undo redo stack
* Added MessageScrollGraph for restoring graph view scroll position
* Fixed MessageGraphNodeMove not saved for bundles
* Refactored tokenIds and nodeNames in SearchMatch and MessageActivateTokens
* Refactored SearchController
* Fixed file expansion on undoing/redoing after switching code view mode
* Fixed redundant graph animation due to present qualifier nodes
* Fixed no restoring of graph node expansion when showing overview in between