Text edit mode: newline character can't be removed by Delete

Came up again in https://musescore.org/en/node/292103

OS: Windows 10 (10.0), Arch.: x86_64, MuseScore version (64-bit): 3.3.0.8267, revision: e36df56

In the above example, backspacing only apparently removes the newline character:

1. Open the attached file.
2. Create any text object in the frame.
3. Type some text, then press Return and type a second line.
4. Backspace through the text to remove the second line. The cursor should now be at the end of line 1.
5. Press Esc to exit.
6. Go back into text edit mode and navigate to the end of the line with the cursor keys.
   Expected result: The cursor stops at the end of the text.
   Actual result: The cursor can be moved one extra space onto a new line, albeit with a smaller line height.

This sheds more light on another issue: #292652: Blank lines of text consisting only of a RETURN are too small in height on some scores.

It's only at the end of a block that you cannot delete the newline. Newlines within the block can be deleted by backspace normally.

IMV, a major bug because of its knock-on effect: see #292652: Blank lines of text consisting only of a RETURN are too small in height on some scores. For example, to space lyric verses in a frame you insert an extra blank line between verses. This no longer works as it should in MS3.

I'd say that other bug is major, this one is not. We don't actually know they are even related.

A fair point.

Related to #272131: [EPIC] Text editing issues.

https://github.com/musescore/MuseScore/pull/5873

Now https://github.com/musescore/MuseScore/pull/5875

Fixed in branch master, commit 1050986069

fix #291402: added the ability to delete \n using the delete key

Fixed in branch master, commit e0d7245ab7

_Merge pull request #5875 from SKefalidis/text-delete

fix #291402: added the ability to delete \n using the delete key (duplicate, the old one was automatically closed for some reason)_

Automatically closed -- issue fixed for 2 weeks with no activity.