Investigate performance issues and request processing status indicator

[Michael-Kolpakov]

Ticket

• Main GitHub ticket

Code reviewers

• @mythter
• @sashapanasiuk5

Summary of issue

1. Catalogs upload in at least 3 minutes.
2. The modal window doesn't close.

Summary of change

1. After long investigations any problems with uploading speed were not detected. Probably, when author of ticket tested application was problems with server performance, but now everything works fine.
2. Added an explicit loading indicator that will be displayed until all necessary requests are completed. This helps user of admin page get better understanding that app is working and he need to wait a couple of seconds.

CHECK LIST

• СI passed
• Сode coverage >=95%
• PR is reviewed manually again (to make sure you have 100% ready code)
• All reviewers agreed to merge the PR
• I've checked new feature as logged in and logged out user if needed
• PR meets all conventions

[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot
14.9% Coverage on New Code (required ≥ 80%)
9.5% Duplication on New Code (required ≤ 3%)
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarCloud