Plugin installer Description tab LTR in RTL, rest not

[dd32]

Mainly a consistency thing here, The Plugin Installer info dialogue currently has english-only content due to the return values of the API being english.

As a result (I assume) the RTL styles for the plugin installer specifically set the text direction to LTR for the description tab, however, other tabs (changelog, other notes, etc) are still rtl'd.

For now, until we have translation support for the content there, it seems best to ltr all the sections?

Suggested change; current:

#section-description {
  direction: ltr;
}

to

#plugin-information #section-holder .section {
  direction: ltr;
}

Upon a second glance, this may cause issues for the translated titles in #16580, so we might want to specifically set the h2 to rtl

originally added in #8047

In [20617]:

Force the plugin details to be LTR for all screens. props dd32. fixes #19778.