Add a Compact mode

[Mr-Pine]

This PR adds a compact mode (by default toggleable with c).
Compact mode changes the following:

• No labels on the AspectFrames
• No wide handles
• No menubar
• Smaller font in the bottom bar

This is especially useful for (small) laptop screens

[Cimbali]

Thanks, this looks interesting. Could you provide before/after screenshots so I can have an idea what this looks like on your setup with your screen resolution etc.? In particular I’m wondering if just changing font sizes would achieve roughly the same effect

[Mr-Pine]

Sure, here's a comparison:

vs

[Cimbali]

I see, you’re gaining 11% on the next/current slides and .9% on the notes, so it’s more of a feature for people who don’t like inefficiency than an actual sizeable increase in fonts. The main drawback I see would be people accidentally pressing the button, and being lost because there’s no obvious way to go back.

I’d like to suggest 2 main changes:

1. compact mode and hiding the menu bar should be 2 separated checkboxes/actions, with a more universal and harder to use shortcut for hiding the menu bar (ctrl+m or ctrl+shift+m should do).
2. try and change the margins through css instead of changing all margins manually on widgets.
   css_provider.load_from_data() replaces all the existing data so we’d need to change the bottom bar font size and margins in one call.

[Cimbali]

@Mr-Pine are you interested in adding those changes to the PR? I may find the time myself at some point but likely not soon.

[Mr-Pine]

Currently I sadly don't have the time to work on this :(

[Cimbali]

No worries, thanks for letting me know.

[Cimbali]

I’ve split the Presentation menu in 2 menus as it was starting to get quite large:

Not 100% sure about the element’s positions yet.