213 improve unit tests sidebar component

[sgobotta]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

This PR provides:

• Unit test cases for the Sidebar component
• Small props refactor to defaults
• Rename DefaultSidebar to SimpleSidebar
• Adds unit tests for the HomeLayout
• Adds unit tests for the AppLayout
• Adds unit tests for the Core component

Closes #213

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

The following options in bold are required for a PR approval. Please check the boxes only if necessary, it help us minimizing the reviewing process.

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[codecov-io]

Codecov Report

Merging #214 into develop will increase coverage by 5.63%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop     #214      +/-   ##
===========================================
+ Coverage     46.8%   52.43%   +5.63%     
===========================================
  Files           94       94              
  Lines          750      759       +9     
  Branches        30       29       -1     
===========================================
+ Hits           351      398      +47     
+ Misses         397      359      -38     
  Partials         2        2

Impacted Files	Coverage Δ
src/components/Core/src/Core.vue	100% <ø> (+100%)	⬆️
src/components/UiComponents/Sidebar/defaults.js	100% <100%> (+30%)	⬆️
src/components/Admin/src/defaults.js	100% <100%> (ø)	⬆️
.../components/UiComponents/Sidebar/SimpleSidebar.vue	100% <100%> (ø)
...components/UiComponents/Sidebar/SidebarHeading.vue	100% <100%> (+66.66%)	⬆️
src/va-auth/src/store/modules/actions.js	69.23% <0%> (+7.69%)	⬆️
src/constants/ui.element.names.js	8.33% <0%> (+8.33%)	⬆️
src/va-auth/src/store/modules/mutations.js	79.16% <0%> (+12.5%)	⬆️
... and 9 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update eec08d2...a2d8ccf. Read the comment docs.