Fixes #1875 and #1849: implemented LCD initialization for low temperatures

Initialization skipped in case of watchdog reset or boot-loader exit.

Only tested on Taranis, somebody else needs to check on Taranis Plus!
The lcdInitStart need delay also and CoOS is not available at that time. We also gain nothing from using CoOS delay, because there is no lower priority task than the menu task from which this functions are called.