fix(sidebar): emit expand event when expanded because of menu click

[yggg]

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:

Closes #1432

[codecov]

Codecov Report

Merging #1897 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1897      +/-   ##
==========================================
+ Coverage   84.19%   84.23%   +0.03%     
==========================================
  Files         235      235              
  Lines        7903     7903              
  Branches      693      693              
==========================================
+ Hits         6654     6657       +3     
+ Misses       1046     1042       -4     
- Partials      203      204       +1

Impacted Files	Coverage Δ
...work/theme/components/sidebar/sidebar.component.ts	56.33% <100%> (+1.4%)	⬆️
...mework/theme/components/sidebar/sidebar.service.ts	88% <0%> (+4%)	⬆️

[ykamchi]

Hi,

Is this bug fixed on version 5.0.0? I still do not get notifications from the service on:

1. this.sidebarService.onExpand().subscribe( ....
2. this.sidebarService.onCollapse().subscribe( ....
3. this.sidebarService.compact().subscribe( ....

Thanks,
Yohay

[Aaron-Linkforce]

Also reporting on 5.0 - onToggle returns a notification, however onExpand doesn't return anything