Fill missing edits

[Varbird]

I committed any file that I changed from version 0.92 so if any changes have been made to these files since then my version might actually be a little outdated. Things to look at in particular are of course fill_missing.py and edit_behavior.py. I put the feature to add everything under one button called fill everything (except sound). One drawback of putting everything into edit_behavior.py (and having one function to fill all) is that it is difficult to count which cards don't have a field or which cards have had their pinyin updated. However, I have tested the button and it works and does manage to fill every field. I also kind of messed up the message that appears with the progress bar.

[ttempe]

Nice job! However, I also did some modifications in parallel.

Would you mind doing the following:

• update your fork from my version. Most changes are going to be overwritten, except edit_behavior.py
• copy your edit_behavior.py to edit_behavior_model.py (and delete edit_behavior.py). Edit_behavior.py is not part of the distribution, it's a local copy created from edit_behavior model.py on startup, if edit_behavior.py is missing.
• check that the program still works. (I've seen some glitches: erase_fields() called without arguments, color/pinyin are inverted...)
• commit & push your edit_behavior_model.py
• make a new pull request.

Then, the next action will be to update [my copy of] fill_missing.py to use the new edit_behavior.py functions. (You'll see that I added multiple functions, including some documentation).

Then I can make a new version of the add-on and share it with the world.