frontend: Various minor improvements.

Made a few more menus reset values to the default in response to the UI
clear input.

Made the minimum info text size less unreasonable, and fixed a locale
issue in the font/size selection menu when parsing option strings.

Made the keyboard mode menu toggle items on double click or UI select.

Made the menuless sliders menu remember the last slider shown (this
probably broke when sliders were moved out of the UI manager itself).

Made a few menus just update the highlighted options when it's adjusted
rather than unnecessarily rebuilding the menu.

Made a few more menus reset on being reactivated to cope with scripts or
other things changing stuff out from under them.

src/frontend/mame/ui/analogipt.cpp

@@ -189,6 +189,13 @@ void menu_analog::custom_render(void *selectedref, float top, float bottom, floa
 }
 
 
+void menu_analog::menu_activated()
+{
+	// scripts could have changed something in the mean time
+	reset(reset_options::REMEMBER_POSITION);
+}
+
+
 void menu_analog::handle(event const *ev)
 {
 	// handle events
@@ -313,9 +320,11 @@ void menu_analog::handle(event const *ev)
 					case ANALOG_ITEM_SENSITIVITY:   settings.sensitivity = newval;  break;
 				}
 				data.field.get().set_user_settings(settings);
+				data.cur = newval;
 
-				// rebuild the menu
-				reset(reset_options::REMEMBER_POSITION);
+				// update the menu item
+				ev->item->set_subtext(item_text(data.type, newval));
+				ev->item->set_flags((data.cur <= data.min) ? FLAG_RIGHT_ARROW : (data.cur >= data.max) ? FLAG_LEFT_ARROW : FLAG_LEFT_ARROW | FLAG_RIGHT_ARROW);
 			}
 		}
 	}
@@ -334,7 +343,6 @@ void menu_analog::populate(float &customtop, float &custombottom)
 
 	// add the items
 	std::string text;
-	std::string subtext;
 	for (item_data &data : m_item_data)
 	{
 		// get the user settings
@@ -359,38 +367,31 @@ void menu_analog::populate(float &customtop, float &custombottom)
 		default:
 		case ANALOG_ITEM_KEYSPEED:
 			text = string_format(_("%1$s Increment/Decrement Speed"), field->name());
-			subtext = string_format("%d", settings.delta);
 			data.cur = settings.delta;
 			break;
 
 		case ANALOG_ITEM_CENTERSPEED:
 			text = string_format(_("%1$s Auto-centering Speed"), field->name());
-			subtext = string_format("%d", settings.centerdelta);
 			data.cur = settings.centerdelta;
 			break;
 
 		case ANALOG_ITEM_REVERSE:
 			text = string_format(_("%1$s Reverse"), field->name());
-			subtext.assign(settings.reverse ? "On" : "Off");
 			data.cur = settings.reverse;
 			break;
 
 		case ANALOG_ITEM_SENSITIVITY:
 			text = string_format(_("%1$s Sensitivity"), field->name());
-			subtext = string_format("%d", settings.sensitivity);
 			data.cur = settings.sensitivity;
 			break;
 		}
 
-		// put on arrows
-		uint32_t flags(0U);
-		if (data.cur > data.min)
-			flags |= FLAG_LEFT_ARROW;
-		if (data.cur < data.max)
-			flags |= FLAG_RIGHT_ARROW;
-
 		// append a menu item
-		item_append(std::move(text), std::move(subtext), flags, &data);
+		item_append(
+				std::move(text),
+				item_text(data.type, data.cur),
+				(data.cur <= data.min) ? FLAG_RIGHT_ARROW : (data.cur >= data.max) ? FLAG_LEFT_ARROW : FLAG_LEFT_ARROW | FLAG_RIGHT_ARROW,
+				&data);
 	}
 
 	item_append(menu_item_type::SEPARATOR);
@@ -454,4 +455,24 @@ void menu_analog::find_fields()
 		m_visible_fields = m_field_data.size();
 }
 
+
+std::string menu_analog::item_text(int type, int value)
+{
+	switch (type)
+	{
+	default:
+	case ANALOG_ITEM_KEYSPEED:
+		return string_format("%d", value);
+
+	case ANALOG_ITEM_CENTERSPEED:
+		return string_format("%d", value);
+
+	case ANALOG_ITEM_REVERSE:
+		return value ? _("On") : _("Off");
+
+	case ANALOG_ITEM_SENSITIVITY:
+		return string_format("%d", value);
+	}
+}
+
 } // namespace ui

src/frontend/mame/ui/analogipt.h

@@ -28,6 +28,7 @@ class menu_analog : public menu
 
 protected:
 	virtual void custom_render(void *selectedref, float top, float bottom, float x, float y, float x2, float y2) override;
+	virtual void menu_activated() override;
 
 private:
 	enum
@@ -70,6 +71,8 @@ class menu_analog : public menu
 
 	void find_fields();
 
+	static std::string item_text(int type, int value);
+
 	item_data_vector m_item_data;
 	field_data_vector m_field_data;
 	std::string m_prompt;