fix: Revert horizontal asset bar

[wbreza]

The horizontal asset bar looks more visually appealing on the bottom and it also opens up more real estate for the main editing surface.

However, it also reduces the overall usability of the app. The vertical scrolling behavior on the moues wheel no longer works and the keyboard shortcut hot keys are inverted.

Let's revert this change for now until we are able to overcome these critical usability requirements.

[codecov]

Codecov Report

Merging #881 into develop will decrease coverage by 0.35%.
The diff coverage is 44.44%.

@@             Coverage Diff             @@
##           develop     #881      +/-   ##
===========================================
- Coverage    88.15%   87.79%   -0.36%     
===========================================
  Files          130      130              
  Lines         4878     4876       -2     
  Branches       903      903              
===========================================
- Hits          4300     4281      -19     
- Misses         576      593      +17     
  Partials         2        2

Impacted Files	Coverage Δ
...c/react/components/pages/editorPage/editorPage.tsx	83.33% <100%> (ø)	⬆️
...eact/components/pages/editorPage/editorSideBar.tsx	39.58% <37.5%> (-36.42%)	⬇️

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[PIC123]

lgtm, would be nice to see if we can figure out a way to allow for other layouts