Add ability fix sidebar container on low resolutions

[denStrigo]

Please read and mark the following check list before creating a pull request:

• I read and followed the CONTRIBUTING.md guide.
• I read and followed the New Feature Checklist guide.

Short description of what this resolves:

[codecov]

Codecov Report

Merging #645 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master     #645   +/-   ##
=======================================
  Coverage   72.44%   72.44%           
=======================================
  Files         153      153           
  Lines        4272     4272           
  Branches      330      330           
=======================================
  Hits         3095     3095           
  Misses       1113     1113           
  Partials       64       64

Impacted Files	Coverage Δ
...work/theme/components/sidebar/sidebar.component.ts	34.07% <0%> (ø)	⬆️