Address some layout issues with odd content spacing on mobile, and footer position (#3022)

* - set vars for player container height and status bar height
- use them to calculate mobile top spacing to adjust for tab content positioning

* give main content section a min height, place footer absolutely at bottom; rm all the fixed footer styling

* cleanup; restructure tabbed display logic and css a bit

* Prettified Code!

* cleanup

* fix(story): footer story needs to be wrapped in RecoilRoot if it is to use Recoil

* revert adding footer to mobile about section

* prevent double scrolling

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Co-authored-by: gingervitis <gingervitis@users.noreply.github.com>
Co-authored-by: Gabe Kangas <gabek@real-ity.com>

web/components/ui/Statusbar/Statusbar.module.scss

@@ -2,7 +2,7 @@
   display: flex;
   align-items: center;
   justify-content: space-between;
-  height: 2rem;
+  height: var(--status-bar-height);
   width: 100%;
   padding: var(--content-padding);
   color: var(--theme-color-components-video-status-bar-foreground);