Library: make BPM display and editing locale consistent

[ronso0]

Bug Description

BPM display:
126.789 (dot)

BPM editor:
126,78900000 (comma)

When I open the editor and type 126. (dot) any further num input is rejected.
The editor would only accept comma as separator.
edit: apparently this happens because . is recognized as thousands separator and the spinbox is limited to 999.

edit: I can't get . as BPM separator in the library if I select German locale in Mixxx.

Locale Settings:

LANG=en_GB
LANGUAGE=en_GB:en
LC_NUMERIC=de_DE.UTF-8
LC_TIME=de_DE.UTF-8
LC_MONETARY=de_DE.UTF-8
LC_MEASUREMENT=de_DE.UTF-8

• system locale is en_GB, in Mixxx I selected System.
  so my numpad separator is ,

Fix:

Use the same separator for both.

Ideal:

Show same separator in table and editor, allow both in editor.

Version

No response

OS

No response

[daschuer]

I can confirm that "128.002" is never a 128002.0 bpm.
So it is kind of nice if Mixxx to "correct" user input errors to a reasonable range. I support that idea.

[ronso0]

Fixed by #13067

allow both , and . in editor

addressed by #13068