[BUG] The IntelliSense shouldn't disappear until select desired object

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: None
• Fix Version/s: None
• Component/s: Fragment Administration
• Labels: None

Step to reproduce:

1. Site Builder > Page Fragments
2. Add a new collection
3. Add a new fragment
4. Type ${ in HTML section
5. Assert the IntelliSense containing available variables popups
6. Continue typing portal
7. Assert the IntelliSense is still shown
8. Delete l

Expected Results:
The IntelliSense should be shown.

1. Click portalUtil
2. Assert the IntelliSense disappears

Actual Results:
The IntellijSense disappears.

Reproduced on:
Tomcat 9.0.17 + MySQL 5.7. Portal master GIT ID: 11b74cdd41defcbc9ebe1f735d1c1b0ea7158692.