Tooltips for buttons

[dev3225]

User story

1. As a user
2. I want tooltips for all buttons that do not explain the user its functionality clearly
3. So that the information about the button is understood clear.

Acceptance criteria

• When the user hovers the pointer over the button, the information on button is shown to the user
• Button works as expected.
• The information vanishes as soon as user moves the pointer out of the button area.

Definition of done (DoD)

• Feature/Bug/Change has been implemented

• Application compiles successfully

• Code is documented

• Feature/Bug/Change is tested by at least one unit or e2e test

• Tests have been passed without warnings (except "deprecated" warnings)

• Changes have been reviewed

• PR has been merged to dev branch

• New dependencies have been added to bill of materials

• Software archticture diagram has been updated

• All acceptance criteria are fullfilled

• Screenshot is attached to issue

DoD general criteria

• Feature has been fully implemented
• Feature has been merged into the mainline
• All acceptance criteria were met
• Product owner approved features
• All tests are passing
• Developers agreed to release