Update v1.21

Minor update. No new feature there, just an improvement of the multi-line text input interface.
The previously used .line. keyword isn't required anymore (although still usable).
More importantly, this changes the way texts are handled and isn't compatible as it is with the previous versions.
If you are already using an older version and don't particularly want/need this interface update, I'd advise to keep using version 1.20 and avoid any trouble.
If you wish to migrate from an older version (v1.20 and below), you will need to manually reinitialise all your Hint and Unlocked text parameters (even empty ones). To do so, cut/paste from the Text tab to the Note tab when there's some text, or open the Note tab when it's empty.

Version 1.21 :

• Improved input for Hint and Unlocked text. WARNING : Those fields (even empty ones) must be reinitalised if you were previously using an older version !
• Memory usage optimisation.
• More detailed and organised plugin description.