Review Activity view design

[JanCizmar]

I am very unhappy with the behavous and look of the activity view in the project.

• The rows have hover state, while there are not clickable
• There is 3 dots on the right, while is suggest it will open dropdown, while it opens detail dialog instead. This should be removed and the row should be clickable
• For larger operation (like modification of multiple fields on key) it shows ... under each section. Please get rid of it.
• When user imports data they cannot see what data is imported
• There is load more button, it should be probably changed to infinite scroll
• There should exist a special view with filtering by user
• For operations without special detail, the clicking should be disabled

[marketachalupnikova]

Also:

• fix issue with activity while adding screenshots

[ZuzanaOdstrcilova]

Will be solved in issue: #2244