The thread content does not align with the thread header when the page is RTL

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.1.0 Beta 1, 7.1.0 Beta 2
• Component/s: Frontend Infrastructure > RTL Infrastructure
• Labels: None
• Fix Priority: 3
• Last Working Version:
  7.0.X
• Sprint: 002 - Ivysaur, S01E12 - Alien

Steps to Reproduce:

1. Add Message Boards portlet to page
2. Create a new thread
3. Click on Home
4. Add Language Selector portlet to page
5. Change the language to Hebrew
6. Click on Recent Posts (פרסומים אחרונים)
7. Click on My Posts (הפרסומים שלי)

Expected Results:
Expected the elements to align.

Actual Results:
Observed that the elements do not align.

Reproduced on:
Tomcat 9.0.6 + MySQL 5.7
Portal master GIT ID: 24073185be5f91277f3629bb0d826200ae45ceac