A happy assortment of fixes (T2425, T2398, T2427, T2267)

The following change will affect all printers:

- Restored old behavior of returning to first LCD menu item on back (T2425)
- Actually disabled PRINTJOB_TIMER_AUTOSTART (T2267)

The following changes will affect Hibiscus only:

- Changed default Z-offset to -1.1 (T2398)
- Fixed issue where "G29 V4" would crash if a failed probe happened (T2427)

Marlin/Conditionals_LulzBot.h

@@ -13,7 +13,7 @@
  * got disabled.
  */
 
-#define LULZBOT_FW_VERSION ".33" // Change this with each update
+#define LULZBOT_FW_VERSION ".34" // Change this with each update
 
 #if ( \
     !defined(LULZBOT_Gladiola_Mini) && \
@@ -1595,8 +1595,7 @@
     #define LULZBOT_EXECUTE_IMMEDIATE_IMPL \
         void execute_commands_immediate_P(const char *pgcode) { \
             /* Save the parser state */ \
-            char saved_cmd[strlen(parser.command_ptr) + 1]; \
-            strcpy(saved_cmd, parser.command_ptr); \
+            char *saved_cmd = parser.command_ptr; \
             /* Process individual commands in string */ \
             while(pgm_read_byte_near(pgcode) != '\0') { \
                 /* Break up string at '\n' delimiters */ \
@@ -1744,7 +1743,11 @@
     #define LULZBOT_DEFAULT_YJERK                 12.0
     #define LULZBOT_DEFAULT_ZJERK                  0.4
 
-    #define LULZBOT_Z_PROBE_OFFSET_FROM_EXTRUDER  -1.375
+    #if defined(LULZBOT_USE_Z_BELT)
+        #define LULZBOT_Z_PROBE_OFFSET_FROM_EXTRUDER  -1.1
+    #else
+        #define LULZBOT_Z_PROBE_OFFSET_FROM_EXTRUDER  -1.375
+    #endif
 
 #elif defined(LULZBOT_IS_TAZ)
     #define LULZBOT_DEFAULT_XJERK                 8.0
@@ -1901,6 +1904,7 @@
     #define LULZBOT_THIN_OVERLAY_ARROWS
     #define LULZBOT_DISABLE_KILL_BUTTON
     #define LULZBOT_ZOFFSET_PRECISION ftostr32
+    #define LULZBOT_RESET_SELECTION_TO_FIRST_ON_MENU_BACK
 #endif
 
 /* Marlin requires static PSTRs to display on the LCD display, because of this */

Marlin/Configuration.h

@@ -1295,7 +1295,7 @@
  *   M76 - Pause the print job timer
  *   M77 - Stop the print job timer
  */
-#define PRINTJOB_TIMER_AUTOSTART
+//#define PRINTJOB_TIMER_AUTOSTART LULZBOT_PRINTJOB_TIMER_AUTOSTART_DISABLED
 
 /**
  * Print Counter

Marlin/ultralcd.cpp

@@ -586,8 +586,10 @@ uint16_t max_display_update_time = 0;
     if (screen_history_depth > 0) {
       --screen_history_depth;
       lcd_goto_screen(
-        screen_history[screen_history_depth].menu_function,
-        screen_history[screen_history_depth].encoder_position
+        screen_history[screen_history_depth].menu_function
+        #if !defined(LULZBOT_RESET_SELECTION_TO_FIRST_ON_MENU_BACK)
+        ,screen_history[screen_history_depth].encoder_position
+        #endif
       );
     }
     else