[Keymap] Moar personal keymap and userspace tweaks (#7238)

* Enable link-time optimization

* Make RGB static gradient ranges shorter

* Shift Quefrency media keys to the right

* Shift KBD67 media keys to the right

* Move some 60% keys from function to adjust layer

* Set "extra" Lily58 keys to browser back/forward

* Remove Instant60 EEPROM hack after #6968

* Remove unnecessary bits from macropad keymaps

* Update KLE images

keyboards/keebio/bdn9/keymaps/bcat/keymap.c

@@ -5,18 +5,15 @@ enum layer {
     LAYER_SECOND,
 };
 
-/* Switch to second layer when held. */
 #define LY_SECND MO(LAYER_SECOND)
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-    /* First layer (F1-F6) */
     [LAYER_FIRST] = LAYOUT(
         KC_MUTE,  LY_SECND, BL_BRTG,
         KC_F4,    KC_F5,    KC_F6,
         KC_F1,    KC_F2,    KC_F3
     ),
 
-    /* Second layer (F7-F12) */
     [LAYER_SECOND] = LAYOUT(
         EEP_RST,  _______,  RESET,
         KC_F10,   KC_F11,   KC_F12,
@@ -26,12 +23,12 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 
 void encoder_update_user(uint8_t index, bool clockwise) {
     switch (index) {
-        /* Top-left encoder (volume): */
+        /* Top-left encoder (volume) */
         case 0:
             tap_code(clockwise ? KC_VOLU : KC_VOLD);
             break;
     
-        /* Top-right encoder (backlight brightness): */
+        /* Top-right encoder (backlight brightness) */
         case 1:
             if (clockwise) {
                 backlight_increase();