Closes#5255, #1046, #28322, #15728
This PR makes `AddSelectionBelow` and `AddSelectionAbove` not skip lines
that are shorter than the current cursor column. This follows the same
behavior as VSCode and Sublime.
This change is only applicable in the case of an empty selection; if
there is a non-empty selection, it continues to skip empty and shorter
lines to create a Vim-like column selection, which is the better default
for that case.
- [x] Tests
The empty selection no longer skips shorter lines:
https://github.com/user-attachments/assets/4bde2357-20b6-44f2-a9d9-b595c12d3939
Non-empty selection continues to skip shorter lines.
https://github.com/user-attachments/assets/4cd47c9f-b698-40fc-ad50-f2bf64f5519b
Release Notes:
- Improved `AddSelectionBelow` and `AddSelectionAbove` to no longer skip
shorter lines when the selection is empty, aligning with VSCode and
Sublime behavior.
6bbab4b55a