Double-clicking on Pascal files in CGE editor, to open them in Lazarus, reliably opens them in proper project

[michalis]

Thanks to the related Lazarus issue being fixed by Juha Manninen, our editor can now open Pascal files in the proper Lazarus project reliably if you use Lazarus >= 2.2.

We also query Lazarus version, to activate new behavior only for new Lazarus. You should see your Lazarus version in the editor preferences window.