[QA] Show progress bar when delete or rename takes longer

[jnweiger]

Steps:

• Click on the "Rename" or "Delete" button of any folder for which the user is permitted
• Type another name and click on OK

ACTUAL: After clicking on "OK" the pop-up will be closed. Ther is no loading bar displayed. After a few seconds the entered name is displayed correctly.

EXPECTED: After the pop-up is closed, a loading bar should be displayed besides the navigation bar while updating the folder name.

[jnweiger]

Same when adding a favorite:

Steps:

• Click on the Favorite icon on any folder/file

ACTUAL: See attached video - After clicking on favorite icon, for a short time nothing happens. There is no loading bar displayed. After a few seconds the folder/file is flagged as favorite correctly.

EXPECTED: After clicking on favorite icon, a loading bar should be displayed besides the navigation bar while updating the content area.

[PVince81]

favorite already reported here: #1903

[PVince81]

I see showing visual feedback as an important feature to make the UI look polished and avoid people wondering whether something is broken.

[dj4oC]

I think my issue is related to this one, but I'm not sure.
When I delete a file or a folder, the DELETE gets disabled after clicking and user needs to wait until action is finished.
but: there is no progress or "please wait" or something else shown to the user and the CANCEL Button is still enabled.
So in my opinion, there should be a busy-spinner and the CANCEL-Button needs to be disables

Please see my screen recording:
https://user-images.githubusercontent.com/115982880/199980048-77cc331f-8fd1-4a0f-8306-285f48f4e1a9.mov