Tool bar size adjustment when contextually zooming out

[chimmyten]

The toolbar icons will now increase in size to compensate when zooming out to help with visibility. Fixes #317.

https://github.com/codepod-io/codepod/assets/105993789/4d4f570d-2d28-47c4-a560-f4b96f8a8c46

I also adjusted the toolbar placement for scopes slightly so it would not block the scope title when zoomed out.

[lihebi]

Nice, thanks!