Launcher: Reduce idle redraw frequency

Idle redraw is mainly to update the clock/battery/wifi icons.

From 100ms to 1000ms.

THEMING.md

@@ -38,7 +38,7 @@ Colors are RGB565 and can be represented as integers or hex strings. The special
         "item_message": "0xBDF7"
     },
     "launcher_1": {
-        "__comment": "This section contains launcher theme variant 1",
+        "__comment": "This section contains launcher colors variant 1",
         "background": "0x0000",
         "foreground": "0xFFDE",
         "list_standard_bg": "transparent",
@@ -47,7 +47,7 @@ Colors are RGB565 and can be represented as integers or hex strings. The special
         "list_selected_fg": "0xFFFF"
     },
     "launcher_2": {
-        "__comment": "This section contains launcher theme variant 2",
+        "__comment": "This section contains launcher colors variant 2",
         "background": "0x0000",
         "foreground": "0xFFDE",
         "list_standard_bg": "transparent",
@@ -56,7 +56,7 @@ Colors are RGB565 and can be represented as integers or hex strings. The special
         "list_selected_fg": "0xFFFF"
     },
     "launcher_3": {
-        "__comment": "This section contains launcher theme variant 3",
+        "__comment": "This section contains launcher colors variant 3",
         "background": "0x0000",
         "foreground": "0xFFDE",
         "list_standard_bg": "transparent",
@@ -65,7 +65,7 @@ Colors are RGB565 and can be represented as integers or hex strings. The special
         "list_selected_fg": "0x0000"
     },
     "launcher_4": {
-        "__comment": "This section contains launcher theme variant 4",
+        "__comment": "This section contains launcher colors variant 4",
         "background": "0x0000",
         "foreground": "0xFFDE",
         "list_standard_bg": "transparent",

launcher/main/main.c

@@ -388,7 +388,8 @@ static void retro_loop(void)
             prev_joystick = 0;
             gui_event(TAB_IDLE, tab);
             next_idle_event = rg_system_timer() + 100000;
-            redraw_pending = true;
+            if (gui.idle_counter % 10 == 1)
+                redraw_pending = true;
         }
         else if (gui.idle_counter)
         {