super+r could default to half-width

[pomdtr]

I have the impression that as users, we often need to split our screen by half, but much less frequently in 3/4 + 1/4.

In PaperWM, to place two window side by side, I need to :

1. Focus the first window
2. 2* super+r
3. super+.
4. 2* super+r
5. super+,

Which seems quite laborious for a basic feature. Default to half-width would improve this.

[hedning]

Yeah, there's some improvements possible here.

<Super>R is currently state-less, it simply picks the first step that's wider than the current width. There's some work in progress which makes <super>r remember things as long as super is down #193. So we can for instance try to preserve the original window position, or make half width the first step.

Now, you can change the step widths in dconf:

dconf write /org/gnome/shell/extensions/paperwm/cycle-width-steps "[0.5]"

@olejorgenb also have code in the making which can do some basic auto-layout (eg. distributing the available width among the visible windows). We should probably get that into examples/keybindings.js at least.

[olejorgenb]

See https://github.com/paperwm/PaperWM/issues/303#issuecomment-636313932 for new actions that will fit two windows in various ratios

[jtaala]

I also note that with #463 winprops can be set for windows by wm_class, title etc.

We could also support wildcards in window winprops? e.g. you could then set a winprop for all windows to set preferred with on create to 50% (or otherwise).