Get Property Managers by new API when editing a property

[Chris-Boe]

Describe the bug
A clear and concise description of what the bug is.
When editing a property, the page does a call to /api/user?r=2, which has been deprecated in favor of /api/property_managers.
Other searches for "user?r=" return uses in the EditTicketModalFetches.js file, these will need to be replaced as well

To Reproduce
Steps to reproduce the behavior:

1. Go to Property list page
2. Click on a property
3. Click into Edit mode by clicking the pencil icon
4. Try searching for a property manager
5. See no results - pm's were not fetched correctly

Expected behavior
A clear and concise description of what you expected to happen.
list of property managers is properly fetched from backend and displayed in the search results

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.