Extract the type casting to a field
Add JumpToDefinitionEvent
Add the jumping even when you're on the command center
Disable the jump-to-definition menu item on the info tab
If jump-to-definition is invoked on an empty token/string, the "couldn't be found" message won't be showed
Get rid of the intermidiate function in the EditorArea
Remove the menu item when on modal dialogs
Some refactoring