Some bugs in 1.15 firmware

[GitJa21]

Device

Sonoffdual (in unnamed device)

Version

1.15

Bug description

Greetings!
I really liked the espurna firmware and the community feedback :)
I have to use firmware version 1.15 (1.14 does not allow me to disable unnecessary events in my unique device #2541)
Firmware 1.15 has some annoying bugs.
I hope this will be helpful when removing them.

1. When I change the Hostname and save - the web interface says "No changes detected". And there's no way to change that. Only through the console. set hostname

2. Description - cannot be set in any way.

3. Also, the device name is not visible as in 1.14 (screenshot)
   

4. NTP server is not working, so I need to change it to something like time.windows.com.
   But after reboot the ntp-server reverts to 195.78.244.50. Impossible to change even through the console.

5. It would be great if "Time Zone" was a drop down list. Since it's quite hard to figure out how to set POSIX TZ
   (Values from https://github.com/esp8266/Arduino/blob/master/cores/esp8266/TZ.h work, but usability...)
   (Time is very important to me because I need a scheduler.)

6. Annoying window saying "Connection lost with the device, click OK to refresh the page" after 5 minutes of idleness.
   Firefox cheeky switches to this tab every 5 minutes! (In version 1.14, there were no such problems at all)

7. I saw someone wanted to be able to centrally manage all Espurna devices... Me too))
   My previous love was the firmware https://github.com/tretyakovsa/Sonoff_WiFi_switch but the guys abandoned the project and the firmware does not work on some chips.
   That firmware had a nice feature - devices see each other due to UPNP.
   So, in interface of one device shows the controls of other devices with the same firmware. (In a separate interface's box. Even can set different devices in the scheduler.)
   I think, this functionality would be useful to us to ))

Steps to reproduce

No response

Build tools used

No response

Any relevant log output (when available)

No response

Decoded stack trace (when available)

No response

[mcspr]

1 & 2, looks like a bug in remote side 'accepting' certain key names and not any others. Just need to restore something acknowledging both of those

4 is related to your network setup, you already have auto-configured NTP server set through DHCP. If you don't want that, set ntpDhcp 0

5 TZ is intentionally left out. It is pita to maintain internally, plus the additional .bin size for all of those and the code managing this list

6 Seems like a page visible / invisible issue, but difficult to say without looking at. We are periodically sending keep-alive messages to see if remote responds. Just need to add handlers that notice page is in the background and stop doing that temporarily

7 For the barebones approach, you might want to look at MQTT messages we send out and use something like https://play.google.com/store/apps/details?id=net.routix.mqttdash
Every device is <NAME>/relay/<RELAY INDEX>, status update is <NAME>/relay/<RELAY INDEX>/set with 0 of 1
Integrating WebUI / UPNP / any other discovery is much... wider topic for just a short answer :)

[ElectricImpossible]

Items 1 & 2 affect me on 1.15.0-dev.gitb0af0afd+github220925

[mcspr]

See commit above. Will be included in the next build.
Closing in favour of separate issues.