Bugfix/482 add remove to icon

[elislaats]

Description

The issue described that the removing a project icon on the edit page does not work. In the meantime the whole button had been removed from the layout. And a comment was provided that this was also an issue on the wizard-page. I added the remove-icon-functionality to both the edit page and the wizard.

I added a button to the edit-page. In the wizard I added an overlay for desktop and a button for mobile.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] I updated the changelog with an end-user readable description
• [x] I assigned this pull request to the correct project board to update the sprint board

Steps to Test or Reproduce

Outline the steps to test or reproduce the PR here. These steps will be used during release testing.

Edit page

1. Visit a project-page for a project you can edit
2. Go to the edit page and (if needed) upload a project icon
3. See the 'remove' button appear and check that it looks good
4. Do the same on (devtools) mobile if you want

Wizard

1. Create a new project
2. Continue to the step where you're adding an icon
3. Upload an icon
4. Check that when you hover the icon it allows you to delete it.
5. Do the same on mobile, this time it's not an overlay but a button that appears

Link to issue

Closes: #482