Comment 5 for bug 1800321

Environment tested: Master
Browser tested: Chrome

PRECONDITIONS:
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1) The following Institutions exist
a) Institution One
b) Institution Two
2) Institution Tags are enabled (found on inst settings page) for both Institutions
3) The following Institution tags for Institution One exist
a) Institution One: Inst1tag - created by Inst admin for Inst One
b) Institution One: INST-ONE - created by Inst admin for Inst One
c) Institution One: SA-INST1 - created by Site admin for Inst One
4) Institution tag " Inst2tag" for Institution Two exists
5) Inst admin for Institution One exists

TEST STEPS:
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1) Log in as Site admin
2) create an institution page for Institution One
3) Verify that all Inst tags for Inst One are able to be selected ✔
4) Select the top one in the list of Inst tags field and save page
5) Edit the page settings
6) Select the top one in the list of Inst tags field

Expected Result: User should not be able to select the same tag that has been previously used

Actual Result: Selecting the same tag will display another tag within the tags field, User can repeatedly use the same tags and each tag will be displayed