Feature: Validate paths in file group folder/file picker

[timotheeguerin]

fix #1362

[codecov]

Codecov Report

Merging #1376 into master will decrease coverage by 23.3%.
The diff coverage is 93.33%.

@@             Coverage Diff             @@
##           master    #1376       +/-   ##
===========================================
- Coverage   53.59%   30.29%   -23.31%     
===========================================
  Files        1003     1004        +1     
  Lines       23691    23714       +23     
  Branches     2715     2717        +2     
===========================================
- Hits        12698     7184     -5514     
- Misses      10993    16530     +5537

Impacted Files	Coverage Δ
app/components/data/action/add/index.ts	100% <ø> (ø)	⬆️
...ents/data/shared/file-or-directory-picker/index.ts	100% <100%> (ø)
app/components/data/shared/data.shared.module.ts	100% <100%> (ø)	⬆️
...ctory-picker/file-or-directory-picker.component.ts	70% <92.85%> (ø)
...pp/services/app-insights/query-result-processor.ts	3.33% <0%> (-96.67%)	⬇️
...tch-flask/core/key-navigator/list-key-navigator.ts	4.04% <0%> (-94.95%)	⬇️
app/utils/cloud-path-utils/cloud-path-utils.ts	8.33% <0%> (-91.67%)	⬇️
app/services/core/poll-service.ts	5.81% <0%> (-90.7%)	⬇️
...pp/components/pool/graphs/heatmap/heatmap-color.ts	4.76% <0%> (-90.48%)	⬇️
src/common/deferred/deferred.ts	10% <0%> (-90%)	⬇️
... and 218 more

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