User setting changes

[clash99]

Changes to user settings page:

• Update top messaging
• Change "Cadasta instance url" label to "Cadasta url"
• Change Cadasta url field to dropdown with "other" option that provides a text input field if selected
• Add "Go" button following instance url (serves to clear fields below upon url change)
• Disable username, password, and connect button until url is selected and "Go" button is clicked
• Removed "auth token empty" message
• Remove "Clear" button until after a successful connection is made
• Move "Connect" button up and turn it blue (except when disabled)
• Show asterisks in password field
• Update "auth token saved" message and combine it with successful connection message
• Change "Clear" button to gray
• Update "auth token empty" message and combine with connection failed

I apologize if some of these may be redundant with other changes already requested in other tasks.

[SteadyCadence]

Hey @dimasciput and @cchristelis!

The big issue I am running into with partners is confusion around the User Settings. I think that the recommendations that Chandra is made here would GREATLY help partners-- particularly the dropdown for the URL.

Could you let me know if all of these changes are possible? If not, are there any workarounds?