Add ability fix sidebar container

[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 #642 into master will decrease coverage by 0.02%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master     #642      +/-   ##
==========================================
- Coverage    72.5%   72.48%   -0.03%     
==========================================
  Files         153      153              
  Lines        4267     4270       +3     
  Branches      330      330              
==========================================
+ Hits         3094     3095       +1     
- Misses       1109     1111       +2     
  Partials       64       64

Impacted Files	Coverage Δ
...work/theme/components/sidebar/sidebar.component.ts	34.07% <33.33%> (-0.02%)	⬇️