Copy bookmark to multiple folders

### Describe the feature you'd like to request

Allow to copy single bookmark into multiple different folders.
This approach treats folders like tags, which lets you flexibly organize bookmarks in multiple dimensions.

### Describe the solution you'd like

In new bookmark and edit dialog "add to folder" button to associate it with multiple folders

### Describe alternatives you've considered

Firefox on desktop native bookmarks allows to copy bookmark to multiple folders. But lacks this feature on Android