Add shortcuts for height and opacity

[jacksongoode]

Default keybindings for increasing/decreasing size are take from Guake, opacity bindings are unset.

This would close #70.

[amezin]

In general, the implementation is correct. Please fix setting and action names, and try to get rid of code duplication.

After that:

1. Please don't change package-lock.json
2. Squash all commits into one

[jacksongoode]

Almost done, but it seems there are errors that's appearing now:

Can't update stage views actor MetaSurfaceActorX11 is on because it needs an allocation.
Can't update stage views actor MetaWindowActorX11 is on because it needs an allocation.
Can't update stage views actor MetaWindowGroup is on because it needs an allocation.

This appears everytime the hotkey is used to increase/decrease the size (silent on transparency changes).

[amezin]

Almost done, but it seems there are errors that's appearing now:

Can't update stage views actor MetaSurfaceActorX11 is on because it needs an allocation.
Can't update stage views actor MetaWindowActorX11 is on because it needs an allocation.
Can't update stage views actor MetaWindowGroup is on because it needs an allocation.

This appears everytime the hotkey is used to increase/decrease the size (silent on transparency changes).

You may ignore these warnings for now. Most likely your code isn't responsible for them.

Do they appear if you open preferences and drag the "Window size" slider?

[jacksongoode]

Almost done, but it seems there are errors that's appearing now:

Can't update stage views actor MetaSurfaceActorX11 is on because it needs an allocation.
Can't update stage views actor MetaWindowActorX11 is on because it needs an allocation.
Can't update stage views actor MetaWindowGroup is on because it needs an allocation.

This appears everytime the hotkey is used to increase/decrease the size (silent on transparency changes).

You may ignore these warnings for now. Most likely your code isn't responsible for them.

Do they appear if you open preferences and drag the "Window size" slider?

Yes, I will ignore them.

One final issue I've noticed is that changes to background-opacity if it is initially set to 1.0 will not appear until the window is moved or selected (focused). Like:

1. Set transparency to 1.0
2. Hide/close window
3. Open window
4. Change transparency in settings
5. Window does not change until focused by selection or move

I believe this is a result of this line. I don't think there is any reason for this? @amezin I've removed this condition to fix the behavior. Let me know if this is incorrect.

[jacksongoode]

Looks good to me so far.

[jacksongoode]

Not sure about the test for gnome-wayland-nested-dual-monitor - is there something I can do @amezin?

[amezin]

If window-maximize is true, resizing should start from 1.0.

1. Maximize the window (F11 by default)
2. Try to decrease its height.

It will resize to the original (unmaximized) size minus HEIGHT_MOD.

IMO it should resize to 1.0 - HEIGHT_MOD instead.

[amezin]

Not sure about the test for gnome-wayland-nested-dual-monitor - is there something I can do @amezin?

No, the test failure is unrelated to your changes. Tests rely on various timeouts too much, and some configurations thus fail from time to time.