tick() => isr() to spotlight interrupt-time

Marlin/src/module/planner.h

     // Wait for moves to finish and disable all steppers
     static void finish_and_disable();
 
-    // Periodic tick to handle cleaning timeouts
+    // Periodic handler to manage the cleaning buffer counter
     // Called from the Temperature ISR at ~1kHz
-    static void tick() {
-      if (cleaning_buffer_counter) --cleaning_buffer_counter;
-    }
+    static void isr() { if (cleaning_buffer_counter) --cleaning_buffer_counter; }
 
     /**
      * Does the buffer have any blocks queued?

Marlin/src/module/temperature.cpp

  *  - Step the babysteps value for each axis towards 0
  *  - For PINS_DEBUGGING, monitor and report endstop pins
  *  - For ENDSTOP_INTERRUPTS_FEATURE check endstops if flagged
- *  - Call planner.tick to count down its "ignore" time
+ *  - Call planner.isr to count down its "ignore" time
  */
 HAL_TEMP_TIMER_ISR() {
   HAL_timer_isr_prologue(TEMP_TIMER_NUM);
 
-  Temperature::tick();
+  Temperature::isr();
 
   HAL_timer_isr_epilogue(TEMP_TIMER_NUM);
 }
  *  - Endstop polling
  *  - Planner clean buffer
  */
-void Temperature::tick() {
+void Temperature::isr() {
 
   static int8_t temp_count = -1;
   static ADCSensorState adc_sensor_state = StartupDelay;
   // Poll endstops state, if required
   endstops.poll();
 
-  // Periodically call the planner timer
-  planner.tick();
+  // Periodically call the planner timer service routine
+  planner.isr();
 }
 
 #if HAS_TEMP_SENSOR

Marlin/src/module/temperature.h

     /**
      * Called from the Temperature ISR
      */
+    static void isr();
     static void readings_ready();
-    static void tick();
 
     /**
      * Call periodically to manage heaters