Improve default bindings for case switching

[xJonathanLEI]

Currently command switch_to_uppercase is bound to Alt + ` and switch_case is to Shift + `. I believe the other way around is better and easier to remember as Alt stands for "alternate", and the Shift key is used to turn a letter to upper case when typing letters.

With the current defaults I always end up pressing the wrong keys lol. WDTY?

[CptPotato]

Incidentally, I just remapped case switching to ´ and ` (which is Shift´) since it didn't work on my German keyboard layout with the default bindings.

I do like the idea of using shift for uppercase. Though I'm not sure if it's worth switching these two in the default keymap, since it might be pretty annoying to people who have internalized the key binds.