mkconfig: Cast RAM size to unsigned to avoid complains about integer overflow in calculatino of CONFIG_RAM_END

STM3240G-EVAL: Kernel mode board initialization can't run on the IDLE thread; needs its on initialization kernel thread

NxWM::CTouchscreen: Add CONFIG_NXWM_TOUCHSCREEN_DEVINIT to suppress attempts to initialize the touchscreen from NxWM in the kernel build

NxWM: Can now disable the NxConsole window.  STM3240G-EVAL knxwm: Disabled the NxConsole for now because there are issues with the kernel build.

NxWidgets server initialization must be performed in the kernel when NxWdigets is built in kernel mode