Glitchiness with warping

[furudean]

The extension could do a better effort to know if a line is warpable before we try to warp to it, especially in the case of the editor->renpy sync modes.

This will require implementing a parser/lexer which can understand the Ren'Py syntax. It would be a good idea to look at what counts as warpable currently inside the Ren'Py source code