Tweak a host prompt call

Marlin/src/feature/host_actions.cpp

@@ -113,12 +113,20 @@ void host_action(PGM_P const pstr, const bool eol) {
   void host_action_prompt_button(PGM_P const pstr) { host_action_prompt_plus(PSTR("button"), pstr); }
   void host_action_prompt_end() { host_action_prompt(PSTR("end")); }
   void host_action_prompt_show() { host_action_prompt(PSTR("show")); }
-  void host_prompt_do(const PromptReason reason, PGM_P const pstr, PGM_P const btn1/*=nullptr*/, PGM_P const btn2/*=nullptr*/) {
-    host_action_prompt_begin(reason, pstr);
+
+  void _host_prompt_show(PGM_P const btn1/*=nullptr*/, PGM_P const btn2/*=nullptr*/) {
     if (btn1) host_action_prompt_button(btn1);
     if (btn2) host_action_prompt_button(btn2);
     host_action_prompt_show();
   }
+  void host_prompt_do(const PromptReason reason, PGM_P const pstr, PGM_P const btn1/*=nullptr*/, PGM_P const btn2/*=nullptr*/) {
+    host_action_prompt_begin(reason, pstr);
+    _host_prompt_show(btn1, btn2);
+  }
+  void host_prompt_do(const PromptReason reason, PGM_P const pstr, const char extra_char, PGM_P const btn1/*=nullptr*/, PGM_P const btn2/*=nullptr*/) {
+    host_action_prompt_begin(reason, pstr, extra_char);
+    _host_prompt_show(btn1, btn2);
+  }
 
   void filament_load_host_prompt() {
     const bool disable_to_continue = TERN0(HAS_FILAMENT_SENSOR, runout.filament_ran_out);

Marlin/src/feature/host_actions.h

@@ -71,6 +71,7 @@ void host_action(PGM_P const pstr, const bool eol=true);
   void host_action_prompt_end();
   void host_action_prompt_show();
   void host_prompt_do(const PromptReason reason, PGM_P const pstr, PGM_P const btn1=nullptr, PGM_P const btn2=nullptr);
+  void host_prompt_do(const PromptReason reason, PGM_P const pstr, const char extra_char, PGM_P const btn1=nullptr, PGM_P const btn2=nullptr);
   inline void host_prompt_open(const PromptReason reason, PGM_P const pstr, PGM_P const btn1=nullptr, PGM_P const btn2=nullptr) {
     if (host_prompt_reason == PROMPT_NOT_DEFINED) host_prompt_do(reason, pstr, btn1, btn2);
   }

Marlin/src/feature/pause.cpp

@@ -199,17 +199,18 @@ bool load_filament(const float &slow_load_length/*=0*/, const float &fast_load_l
     first_impatient_beep(max_beep_count);
 
     KEEPALIVE_STATE(PAUSED_FOR_USER);
+
     #if ENABLED(HOST_PROMPT_SUPPORT)
       const char tool = '0'
         #if NUM_RUNOUT_SENSORS > 1
           + active_extruder
         #endif
       ;
-      host_action_prompt_begin(PROMPT_USER_CONTINUE, PSTR("Load Filament T"), tool);
-      host_action_prompt_button(CONTINUE_STR);
-      host_action_prompt_show();
+      host_prompt_do(PROMPT_USER_CONTINUE, PSTR("Load Filament T"), tool, CONTINUE_STR);
     #endif
+
     TERN_(EXTENSIBLE_UI, ExtUI::onUserConfirmRequired_P(PSTR("Load Filament")));
+
     while (wait_for_user) {
       impatient_beep(max_beep_count);
       idle_no_sleep();