#333: Root folder suggestions

[kirillt]

#333
Updated requirements:

• folder suggesting dialog must be separate from scan dialog
• folder suggesting dialog must be presented after scan dialog
• if any of suggested folders is already added, it should be excluded from suggestions
• if no folders remain to suggest, folder suggesting dialog can be omitted

Would be nice to have:

• if the app can't find .ark-global folder with a list of roots inside, it should ask for scan
• if there is .ark-global folder with a list of roots inside, the app shouldn't ask for scan
• disk root causes problems, should be filtered when added folders in any moment
  one kind of problems is blank screen when I try to unfold it (in folders screen)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[sonarcloud]

Quality Gate passed

Issues
1 New issue

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud