Feature: metadata picker

[johnnyzhang82]

Fixed #1318, Added metadata picker in

1. pool create form
2. job create/edit form
3. job schedule create/edit form

• Fixed datetime picker calender icon size issue
• Fixed json editor caches previous data when first time load after close unsaved form
• Fixed editable table not populating default for empty table when switching view issue

[codecov]

Codecov Report

Merging #1321 into master will increase coverage by <.01%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master    #1321      +/-   ##
==========================================
+ Coverage   52.95%   52.95%   +<.01%     
==========================================
  Files         990      990              
  Lines       23204    23205       +1     
  Branches     2627     2627              
==========================================
+ Hits        12288    12289       +1     
  Misses      10916    10916

Impacted Files	Coverage Δ
.../add/job-schedule-create-basic-dialog.component.ts	31.7% <ø> (ø)	⬆️
...ob/action/add/job-create-basic-dialog.component.ts	68.23% <ø> (ø)	⬆️
...l/action/add/pool-create-basic-dialog.component.ts	12.38% <ø> (ø)	⬆️
src/@batch-flask/ui/editor/editor.component.ts	22.36% <0%> (-0.3%)	⬇️
app/models/forms/create-job-model.ts	100% <100%> (ø)	⬆️
...ui/form/editable-table/editable-table.component.ts	100% <100%> (+1.58%)	⬆️
app/models/forms/create-pool-model.ts	17.5% <100%> (ø)	⬆️
app/models/forms/create-job-schedule-model.ts	21.42% <100%> (ø)	⬆️

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