When renaming, limit input length of filename

[GfEW]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Enforce the 255 B length limit immediately when the new filename is being entered, either

• (a) as a hard limit, or
• (b) (preferably) by a red hint "filename too long" and the OK button greyed out.

Why do you want this feature?

The silent omission of some parts of the information entered by the user for it to be the new filename comes as a bad surprise when later discovered.

Contrary to that risk, there's no use in letting the user submit a longer name than allowed on disk.

The user should rather encounter the limitation immediately, and thereby, be warned and enabled to adjust the new name accordingly in a more sensible, controlled way.

Additional information

• Long, descriptive names tend to correlate with long, important media because these are worth the effort to make sure they can be found by filename searches later on.
• The silent omission problem got introduced by the way Renaming: if filename too long, file gets irrecoverably deleted without warning #129 was fixed.