[MDS-4971] Help Guide bugs

[taraepp]

Objective

Clean up high-priority/easy bugs for help guide:

• remove "align" as it didn't do anything (maybe it left-aligned it but it was already left-aligned? Not sure, but left align is best align anyway)
• remove video- complicated (the dom sanitizer strips it and I think I saw a CORS or similar error in the editor on test)
• customize colours available for selection 🌈
• style the blockquote
• add in cancel edit with confirm wrapper
• make ? button styling consistent on active/focus state too
• copy over list styling from the react-quill stylesheet

MDS-4971

Why are you making this change? Provide a short explanation and/or screenshots

[sonarqubecloud]

Quality Gate passed for 'bcgov-sonarcloud_mds_minespace-web'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[sonarqubecloud]

Quality Gate passed for 'bcgov-sonarcloud_mds_common'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
81.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[sonarqubecloud]

Quality Gate failed for 'bcgov-sonarcloud_mds_core-web'

Failed conditions
13.3% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud