Adding filter to the main GUI

[DrunkSimurgh]

To navigate easily through the [possibly] many scripts in the list we can add an edit control object to the main GUI and search through the names of the scripts in the list containing the text in that edit control object.

Also, in order to distinguish between karaoke effects and typesetting scripts we can:

• either recommend the developers to name the folder of their script (which is also currently the name that's shown in the script list) with a [KFX] at the end of the folder name (e.g.: sakura [KFX]) and name the typesetting script with a [TS] at the end
• or recommend the developers to add a variable to the parameters file of their scripts for karaoke effects (e.g.: kfx: Boolean) and we use that variable to name the scripts in the main GUI list properly.

This way we can search for [KFX] and [TS] in the edit control object to list all the karaoke effects and all the typesetting scripts respectively.