Feature request: Improve behaviour around read-only file editing

[IanKemp]

Currently, if you open a read-only file in NPP and start typing in it, your keystrokes are simply discarded with no indication that this is happening.

A better option would be to play the default Windows beep sound when a user types in a read-only document, to warn them their actions aren't doing what they think.

An even better option would be to popup a dialog offering to make a read-only document non-read-only if a user starts typing in it.

The best option would be to have an "Automatically clear read-only flag on document edit" option under Settings > Preferences. If false (default) it retains the same behaviour as current (optionally with the above two suggested enhancements), if true it auto unsets the read-only flag as soon as the user starts typing in a read-only document.

[CorwinKeneth]

An even better behavior would be to allow editing a read-only file, but to ask for a different filename when the user tries to save it. Basically, to treat "Save" hotkey as "Save as..." if the file is read-only.