SolaX: align entity names with the cloud app

Display names of the hybrid battery-mode settings now match what the SolaX
cloud app shows, so a setting is called the same thing in both places.
Keys and entity ids are unchanged.

  Selfuse Night Charge           -> Self Use Charge from Grid
  Selfuse Discharge Min SOC      -> Self Use Min SoC
  Selfuse Nightcharge Upper SOC  -> Self Use Charge Battery to
  Feedin Discharge Min SOC       -> Feed-In Priority Min SoC
  Feedin Nightcharge Upper SOC   -> Feed-In Priority Charge Battery to
  Backup Discharge Min SOC       -> Backup Min SoC
  Backup Nightcharge Upper SOC   -> Backup Charge Battery to
  Charge Start 1 / Charge End 1  -> Force Charge Start / Force Charge End
  Discharge Start 1 / End 1      -> Allowed Discharge Start / End

"Feedin Priority" becomes "Feed-In Priority" everywhere, including the
remote control power control options, since it is a mode name in the app.

Self Use Charge Battery to only applies while Self Use night charge is
enabled, so it uses active_when to follow that switch.

Every entity name spelling the state of charge as "SOC" now uses "SoC",
matching the app and the entities already renamed above: Min SoC, Restart
SoC, Selfuse Backup SoC, Switch On SoC, Battery Charge Upper SoC,
PeakShaving Max/Reserved SoC, Min Esc SoC, the Dual Battery Charge Upper
SoC readbacks and the Remotecontrol Target/Minimum SoC numbers. Select
option values such as "Reference SOC" are left alone, since automations
match those by string.

Author: Bl00d-B0b