[5.2] Tinymce lang sort - Part 2

[tecpromotion]

Summary of Changes

I assume that the initial PR #43910 was against 5.1-dev @brianteeman?
In 5.2, two further strings are not sorted correctly.

Testing Instructions

code review

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[brianteeman]

I am happy with this PR. The problem arises because some sorts put _ at the beginning and some put it at the end

[Hackwar]

Merged after code review. Thank you @tecpromotion!