Support APLAN features

[abrudz]

• In the Windows IDE, pressing (it also has a dedicated [⋄] button and a Syntax>Array Notation menu item) from within an Editor switches to APLAN mode. Ride should have comparable capabilities.
• Reformatting in APLAN mode, use the interpreter to reformat (even if set to use Ride's own formatter) because it can have execution side effects
• When default output is using APLAN, the output should be understood as an input group
• When editing any line of a multi-line input group, the margin should show a bracket (not round blobs) and should undo all changes in the entire block
• Allow "broken" [] and ()

4.6.4140

[e9gille]

I believe these are now implemented in master branch. @abrudz if you could please check that you are happy and close if you are.