Feature/2216/active workflow clear

[garyluu]

For dockstore/dockstore#2216

Hide whitespace changes when reviewing

Basically sets active workflow and tool to null upon workflow component and tool component init.

But because my-workflow and my-tool checks for tool or workflow, it must be moved down the chain to avoid expressionChangedAfterItHasBeenChecked.

[codecov]

Codecov Report

Merging #578 into develop will decrease coverage by 0.01%.
The diff coverage is 40%.

@@             Coverage Diff             @@
##           develop     #578      +/-   ##
===========================================
- Coverage    61.76%   61.75%   -0.02%     
===========================================
  Files          235      235              
  Lines         7101     7104       +3     
  Branches       694      693       -1     
===========================================
+ Hits          4386     4387       +1     
- Misses        2545     2547       +2     
  Partials       170      170

Impacted Files	Coverage Δ
src/app/workflow/tool-tab/tool-tab.component.ts	69.23% <0%> (ø)	⬆️
src/app/shared/state/workflow.service.ts	53.96% <66.66%> (-0.14%)	⬇️
src/app/shared/tool/tool.service.ts	69.56% <66.66%> (-3.17%)	⬇️

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[garyluu]

Removed all the non-relevant formatting changes