Enhance layout of bottom button bar in 'select destination' dialog

[min7-i]

When copying or moving images the dialog to select the destination offers three buttons in the bottom bar: Other folder, Cancel and OK. This looks fine with default display/text size when the app language is set to English:

However, in other languages, e.g. German, and probably also with other display/text sizes the buttons are not displayed in a single row but in separate ones. This effectively hides the 'Other folder' button. In order to see it, you need to scroll within the bottom bar.

Click to see screenshots

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Going by the translations on Weblate I'd say that there are some other languages which are affected by this.

I was wondering about the best way to improve this. These are my suggestions:

1. Short-term: Add a comment to the string in Weblate that the translated string shouldn't be longer than x characters. (I guess depending on character width this should be between 10-12 characters.) That way translators could check if there is a shorter term they could use.
2. Long-term: Redesign the button bar and maybe replace the 'Other folder' button by a floating button, similar to the 'eye' button used to show hidden folders.

In my opinion the solution in no. 1 would at least enhance the current situation while no. 2 would probably address the issue when using larger display or text sizes.

If you can think of any better or easier solutions, please let me know.