HTML tags and similar markup may appear jumbled on RTL pages due to the
standard algorithm used for character placement. With this patch, we
detect all tags (HTML or MediaWiki-supplied) and wrap them with
<span class=cm-bidi-isolate>. This CSS class forces the content to be
LTR, making the tags easier to work with on RTL pages.
Bug: T358804
Change-Id: I1338afeefa16102d5cc8fd6c8a236c144e5cf81f
