Return from Autoload filament and Load filament menu item to parent menu.

Exception is Load filament, when temperature is sufficient to load filament, in such case, load filament is started and GUI returns to status screen.

Firmware/Timer.cpp

@@ -6,6 +6,12 @@
 #include "Timer.h"
 #include "Arduino.h"
 
+/**
+ * @brief construct Timer
+ *
+ * It is guaranteed, that construction is equivalent with zeroing all members.
+ * This property can be exploited in MenuData union.
+ */
 Timer::Timer() : m_isRunning(false), m_started()
 {
 }