fix: fix gap in proposal sidebar bottom

[wa0x6e]

Summary

Closes: https://github.com/snapshot-labs/workflow/issues/297

This PR fix the gap in the Affix sidebar bottom.

Most of the changes are about adding an encapsulating <div> to all views which do not already have it, to allow passing the pb-6 class to router view, instead of it being set directly on the Layout/App.

This will allow each view to overwrite the bottom padding class if necessary, instead of polluting the App layout.

How to test

1. Go to http://localhost:8080/#/s:aave.eth/proposal/0xef7dfa4e96e5f6a7337648d2dd3882f7b10e969c9564c118a34ce99eccec9383
2. Scroll to bottom of the page
3. The right sidebar bottom should go all the way to the page bottom

[wa0x6e]

Description updated to explain why there's so many files changed

[ChaituVR]

Haven't reviewed/tested everything but i noticed this border missing when votes are loading

[ChaituVR]

This pb-6 is missing on proposal page with new changes, at first I thought this space is useless but when I open mobile menu, some part of proposal is not visible

Current UI	New changes

maybe we need this space?

[wa0x6e]

This pb-6 is missing on proposal page with new changes, at first I thought this space is useless but when I open mobile menu, some part of proposal is not visible

Current UI New changes

maybe we need this space?

the pb-6 class was not for the mobile bottom menu, as it was there before it was introduced. I think it's just there to give more room to main content, and avoid having it too close to page bottom.

Even on master, content is hidden behind the mobile menu

[wa0x6e]

Haven't reviewed/tested everything but i noticed this border missing when votes are loading

Fixed, by removing the absolute class on the loading indicator.

I noticed that it's the only place with that absolute class, and I did not noticed any issues by removing it. Is there some edge case I am not aware of ?

[ChaituVR]

tAck