Fixed bugs:
- critical bug: forgot to add the new file error handler to another function call, which would make the app break. this is now fixed. (note to self: don't fix code in a hurry)
- rolling the mouse wheel after selecting a template would give errors, this is now fixed.
- escape didn't properly work when selecting a template, this is now fixed.
- fixed a KeyError for missing values in morphs by setting the missing values to a default of 0