Fix [RTL]: mirror legacy page card arrow

[ARMBouhali]

TL;DR - fixes a forward arrow in pages & resources > page card that wasn't mirrored for RTL.

Details

• the mirroring is done within the PageCard.scss file where a transform: scaleX(-1) CSS property is used on an RTL selector. It's much cleaner and lighter than editing JS code.

Screenshots
The forward arrow button should follow text direction

LTR for reference	RTL before fix	RTL after fix

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[codecov]

Codecov Report

Base: 72.99% // Head: 72.99% // No change to project coverage 👍

Coverage data is based on head (5316bbe) compared to base (748aee2).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #358   +/-   ##
=======================================
  Coverage   72.99%   72.99%           
=======================================
  Files         106      106           
  Lines        2037     2037           
  Branches      496      496           
=======================================
  Hits         1487     1487           
  Misses        522      522           
  Partials       28       28           

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[mphilbrick211]

Hi @ARMBouhali - is this ready for review / approval for testing?

[ARMBouhali]

@mphilbrick211 Now it's ready after I switched to CSS-only changes.
Can you please authorize the checks?

[mphilbrick211]

@jristau1984 could you please review and authorize tests to run?

[mphilbrick211]

@jristau1984 could you please review and authorize tests to run?

Friendly ping on this @jristau1984. Also tagging @brian-smith-tcril in case he can help authorize the tests as well.

[mphilbrick211]

@brian-smith-tcril - Jeremy is out of the office, would you mind reviewing and allowing tests to run?

[brian-smith-tcril]

LGTM!

[arbrandes]

+1

[arbrandes]

+1

[openedx-webhooks]

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