Fix LTI content embedded in RCE submissions not displaying in SpeedGrader

[vargaat]

refs: MBL-17939
affects: Teacher
release note: Fixed LTI content embedded in RCE submissions not displaying in SpeedGrader.

test plan: See ticket

Screenshots

Before	After

Checklist

• Follow-up e2e test ticket created
• Tested on phone
• Tested on tablet

[inst-danger]

Teacher Build QR Code:

[inst-danger]

	Warnings
⚠️	One or more files are below the minimum test coverage 50%

Release Note:

Fixed LTI content embedded in RCE submissions not displaying in SpeedGrader.

Affected Apps: Teacher

MBL-17939

Coverage	New %	Master %	Delta
Canvas iOS	91.12%	91.12%	0%
Core/Core/Planner/CalendarEvent/Model/API/PostCalendarEventRequest.swift	0%	0%	0%
Core/Core/Planner/CalendarEvent/View/CustomFrequencyComponents/OccurrencesCountInputDialog.swift	0%	0%	0%
Core/Core/Planner/CalendarEvent/Model/Helpers/RecurrenceRule+SelectionDescription.swift	43.33%	43.33%	0%
Core/Core/Grades/View/CustomSwipeAction.swift	0%	0%	0%

Generated by 🚫 dangerJS against 6d11171

[rh12]

QA + 1

The only thing I noticed is that we display no loading indicator after opening the page, which is especially noticeable in Light Mode, because in Dark Mode at least the empty white page shows soon.
But I believe this is entirely unrelated to this PR.

[ndrsszsz]

QA +1