control panel navigation bar disappears on back navigation after creating page templates

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X
• Fix Version/s: 7.1.10 DXP FP12, 7.1.X
• Component/s: Page Templates
• Labels:
  • ee-7.1.x-only
  • ee-ts
  • liferay-fixpack-dxp-12-7110
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Story Points: 0.25
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/14227

Description:
During Site Template creation and configuration, the UI is not displaying a back button or the Control Panel Toggler which prevents you from navigating out of the current page.

Steps to Reproduce:
1) Build > Pages > Page Templates
2) Create a collection and an entry > Publish entry
3) Pages > New Public Page
4) Select the collection and entry created in (2)
5) Enter page name and Save
6) On the edit screen, click the back arrow next to the Control Panel View Toggler

Expected Result: Navigated back to Pages screen. The navigation bar / control panel are there (maximized).
Actual Result: Navigated back to Pages screen. The navigation bar / control panel are not there (pop_up).

Branch:  Reproduced. 4fb337ec68b77d9e34776c3b3273aafec9be43ce
Master:  Fixed in Master. 758f055954410ca7c1d8ba46b18fdd28ea9c611e