Fix Color UI external_control, wait_for_release (#19771)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/lcd/tft/touch.cpp

 touch_control_t Touch::controls[];
 touch_control_t *Touch::current_control;
 uint16_t Touch::controls_count;
-millis_t Touch::now = 0;
+millis_t Touch::last_touch_ms = 0;
 millis_t Touch::time_to_hold;
 millis_t Touch::repeat_delay;
 millis_t Touch::touch_time;
 
   if (!enabled) return;
 
-  if (now == millis()) return;
-  now = millis();
+  // Return if Touch::idle is called within the same millisecond
+  const millis_t now = millis();
+  if (last_touch_ms == now) return;
+  last_touch_ms = now;
 
   if (get_point(&_x, &_y)) {
     #if HAS_RESUME_CONTINUE
       if (wait_for_user) {
         touch_control_type = CLICK;
         ui.lcd_clicked = true;
+        if (ui.external_control) wait_for_user = false;
         return;
       }
     #endif
 
     #if LCD_TIMEOUT_TO_STATUS
-      ui.return_to_status_ms = now + LCD_TIMEOUT_TO_STATUS;
+      ui.return_to_status_ms = last_touch_ms + LCD_TIMEOUT_TO_STATUS;
     #endif
 
     if (touch_time) {
       #if ENABLED(TOUCH_SCREEN_CALIBRATION)
-        if (touch_control_type == NONE && ELAPSED(now, touch_time + TOUCH_SCREEN_HOLD_TO_CALIBRATE_MS) && ui.on_status_screen())
+        if (touch_control_type == NONE && ELAPSED(last_touch_ms, touch_time + TOUCH_SCREEN_HOLD_TO_CALIBRATE_MS) && ui.on_status_screen())
           ui.goto_screen(touch_screen_calibration);
       #endif
       return;
     }
 
-    if (time_to_hold == 0) time_to_hold = now + MINIMUM_HOLD_TIME;
-    if (PENDING(now, time_to_hold)) return;
+    if (time_to_hold == 0) time_to_hold = last_touch_ms + MINIMUM_HOLD_TIME;
+    if (PENDING(last_touch_ms, time_to_hold)) return;
 
     if (x != 0 && y != 0) {
       if (current_control) {
       }
 
       if (current_control == NULL)
-        touch_time = now;
+        touch_time = last_touch_ms;
     }
     x = _x;
     y = _y;
   current_control = control;
   if (delay) {
     repeat_delay = delay > MIN_REPEAT_DELAY ? delay : MIN_REPEAT_DELAY;
-    time_to_hold = now + repeat_delay;
+    time_to_hold = last_touch_ms + repeat_delay;
   }
   ui.refresh();
 }

Marlin/src/lcd/tft/touch.h

     static void reset() { controls_count = 0; touch_time = -1; current_control = NULL; }
     static void clear() { controls_count = 0; }
     static void idle();
-    static bool is_clicked() { return touch_control_type == CLICK; }
+    static bool is_clicked() {
+      if (touch_control_type == CLICK) {
+        touch_control_type = NONE;
+        return true;
+      }
+      return false;
+    }
     static void disable() { enabled = false; }
     static void enable() { enabled = true; }
 

Marlin/src/lcd/ultralcd.cpp

     set_status_P(msg, -1);
   }
 
-  #if ENABLED(SDSUPPORT)
-    extern bool wait_for_user, wait_for_heatup;
-  #endif
-
   void MarlinUI::abort_print() {
     #if ENABLED(SDSUPPORT)
       wait_for_heatup = wait_for_user = false;

Marlin/src/module/probe.cpp

 #include "../gcode/gcode.h"
 #include "../lcd/ultralcd.h"
 
-#include "../MarlinCore.h" // for stop(), disable_e_steppers, wait_for_user
+#include "../MarlinCore.h" // for stop(), disable_e_steppers
 
 #if HAS_LEVELING
   #include "../feature/bedlevel/bedlevel.h"