When enabled, MethodView input and selection would be updated to the Java element
selected in the editor each time when the selection in the editor changes. Note that
change in caret position and deselect a selection would not trigger a synchronization.
This is most handy when there are nested class. Selecting a region in the nested class
would cause MethodView to show methods in the nested class and select the method at the
beginning of the selection.
When disabled, MethodView only updated on editor activations. That would put less
demand on the system, but would be tricky to show methods in nested classes (In that
case, position caret in the nested class and switch editor out and back). When
MethodView page is not visible, MethodView is clever enough to ignore editor selection
changes, so it is not neccessary to disable the selection synchronization in most case.