Change initial and reminder disconnection translations to specify a 15 to 20 minute window to expect a reconnection message (CU-86dquwxnu).

[micahdbak]

This is a minor PR to reword the disconnection translations. It changes no logic or code, just the messages.

Test plan:

• [ ] Test cases pass

[trisapeace]

Task linked: CU-86dquwxnu Reconnection Message Not Being Sent After Sensor Reset