[Spaces] Remove multiple Spaces

[tbsbdr]

Pre-submission Checks

• [X] I checked for similar issues, but could not find any. I also checked the closed issues. I could not contribute additional information to any existing issue.
• [X] I will take the time to fill in all the required fields. I know that the bug report may be dismissed otherwise due to lack of information.

Feature description

Userstory: As a regular user who wants to tidy up unnecessary Spaces from my windows explorer, I want to remove multiple Spaces at once so that I don’t need to to repetitive actions for tidying up.

Proposed solution

Step 1

• Synced Spaces show Space image (Square, cropped) or Space placeholder icon like: remix icon "Function fill" or material icon "Grid view"
• Rename button "Add a Space" -> "Add or remove Space"
• Click on "Add or remove Space" opens Dialog

Step 2

• deselect one or many Spaces

Step 3

• unselected Spaces don't show the Edit button in its row
• click on "Apply" removed the sync-connection (like current behavior)

Step 4

• Show confirmation dialog
• Headline: "Stop syncing Spaces?"
• Message: "The following Spaces will stop syncing: - Aurora Monitor - Exoplanets exploration Note: This will not delete any files. [Cancel][Ok]"
• "Ok" is marked as primary action as its a non-destructive action.

Step 5

Multiple Spaces where removed:

Alternative solutions you considered

No response

Additional context

No response

[tbsbdr]

cc @hodyroff