Reselecting current date, after deleting it from the input field, in the datepicker will result into a blank date

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP58, 7.0.0 DXP SP9, 7.0.X, 7.1.X, Master
• Component/s: Frontend Infrastructure
• Labels:
  • ee-ts
  • liferay-dxp-70-sp9
  • liferay-fixpack-de-58-7010
  • liferay-fixpack-dxp-1-7110
• Branch Version/s:
  7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Story Points: 0.25
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/62205

Reproduction steps:
1) Patch DXP with the latest fix pack and start the server, login as Admin
2) Go to left side Product Navigation Menu > DXP site > Content > Web Content
3) Add a new Basic Web Content
4) Click on the Schedule tab and then in the datepicker field for "Display Date"
5) Highlight today's date(that`s the default value) (CTRL+A) and blank it out (Backspace): date will become: mm/dd/yyyy
6) A calendar pop-up window should be opened already: select today's date into it

Expected: The date in the "Display date" field to become today's date
Actual behavior: the date will stay as mm/dd/yyyy. After choosing another date (e.g. tomorrow's), today's date will also work

 Reproduced on branch @ d268e05d50ad5fcefd20295c473f7f8d4b4c9359f4f60a65c830f3f3ad43e376
 Reproduced on master @ 72baaad4cef5371e8fafd2580fb101628013b0d20fe352f2a513898a89c1e943