BUG: Browser Cache after Update

[MrJack91]

Bug Description Some Information are hard cached in the UI (the seconds parts shows the temporarily solution):

• apollo_url -> clear full site data
• list of tasks -> ctrl+f5
• version numbers in the left side panel at the bottom -> ctrl+f5

We had this problem over some upgrades. Not sure when it started, but clients still use the old GUI.

Steps To Reproduce

1. upgrade ui (& server) - we use prefect server start
   • or change the apollo url in the config.toml

     [server]
     [server.ui]
     apollo_url="https://tst.cdwh.uhbs.ch:443/graphql"

2. in the ui you will not see these changes always.

Browsers Tested:

• [x] Chrome
• [ ] Firefox
• [ ] Safari
• [ ] Edge
• [ ] IE

[concreted]

I am also seeing this issue (have tried on Docker tag prefecthq/ui:core-0.15.5). I am seeing the Apollo URL stored in localStorage under a <timestamp>_server_url key. localStorage.clear() works to refresh the Apollo URL, but would be better if it can be automatically refreshed.

[zhen0]

Relevant slack discussion: https://prefect-community.slack.com/archives/C014Z8DPDSR/p1631777113319300