Class elements are stripped out by Alloy Editor when switching between code view and text view

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X, Master
• Fix Version/s: 7.0.0 DXP FP94, 7.0.X, 7.1.10 DXP FP19, 7.1.X, 7.2.10 DXP FP8, 7.2.10.2 DXP SP3, 7.2.X, 7.3.4 CE GA5, 7.3.10 DXP GA1, Master
• Component/s: Alloy Editor, Blogs
• Labels:
  • ee-ts
  • liferay-dxp-72-sp3
  • liferay-fixpack-de-94-7010
  • liferay-fixpack-dxp-19-7110
  • liferay-fixpack-dxp-8-7210
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 2
• Git Pull Request: https://github.com/boton/liferay-portal/pull/198

Description:
Class elements are stripped out by Alloy Editor when switching between code view and text view.

Steps to Reproduce:
1. Create a Blog post.
2. Switch to source view and enter the following:

<p class="green">Test</p>

3. Switch to the text view.
4. Switch back to the code view.

Expected:
The color class is still present.
Actual:
The color class has been stripped out.

Additional Testing:
70x: 9cff84229d106eff9edf8a6c8899c661488e2950
Issue reproduced.
master: 3ed57edb3ee4e6d1d569fa2fd064fe315130a8ee
Issue reproduced.