Mobile Bug fix

[YaleChen299]

Description

Fixes:

• Popover2 arrow bug introduced in Mobile Missions Workspace #1662
• Handle mobile panel height when the top control bar is rendered in the MobileWorkspace
• Pre-existing image and pre tag styling issues when SideContentTabs get too narrow
• Input into AceEditor causing app to scroll to the top on IOS devices
• Cleaned up user-agent sniffing in MobileWorkspace
• Added Github ControlBar buttons into the Mobile Playground

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Code quality improvements

How to test

Checklist

• I have tested this code
• I have updated the documentation

[coveralls]

Pull Request Test Coverage Report for Build 696940162

• 1 of 23 (4.35%) changed or added relevant lines in 5 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.07%) to 28.272%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/commons/controlBar/ControlBarGitHubButtons.tsx	0	1	0.0%
src/commons/controlBar/ControlBarPersistenceButtons.tsx	0	1	0.0%
src/commons/assessmentWorkspace/AssessmentWorkspace.tsx	1	4	25.0%
src/commons/editor/Editor.tsx	0	8	0.0%
src/commons/mobileWorkspace/MobileWorkspace.tsx	0	9	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/commons/controlBar/ControlBarPersistenceButtons.tsx	1	10.53%
src/commons/editor/Editor.tsx	1	7.14%

Totals
Change from base Build 696938685:	-0.07%
Covered Lines:	2249
Relevant Lines:	7284

---

💛 - Coveralls

[chownces]

Fixes pre-existing image and pre tag styling issues in SideContentTabs when div gets too narrow. Fixes Popover2 arrow bug in workspace component, which was introduced in #1662

[chownces]

To add in Github buttons to mobile workspace (which was missed out in the previous Github PR). And handle an editor bug where the app scrolls to the top on input into the editor (on iOS Safari).