The pattern editor was resetting the flag that marked text changes on
every frame, but resolving a text change may take more than one frame,
so instead I created a function that allows the resetting of the text
changed boolean from view pattern editor.
Currently, when a pattern is evaluated the pattern editor will lose
focus regardless of how evaluation was triggered. This is specially
annoying when using f5 or auto-evaluate. Now whenever a pattern is
evaluated, focus is given to the pattern editor when evaluation ends.
JumptoLine didn't work for empty lines.
Co-authored-by: Nik <werwolv98@gmail.com>
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