[Keymap] ANAVI Macro Pad 8 fix kodi and default (#10727)

Improvements and bug fixes for the keymaps kodi and default for
ANAVI Macro Pad 8:

- Add space to the end of string "Active layer: " for better
  visibility on the mini I2C OLED display for both keymaps
- Replace "Main" with "Kodi" for the Kodi keymap
- Add comment with reference to Kodi documentation for the
  available shortcuts in this keymap

Signed-off-by: Leon Anavi <leon@anavi.org>

keyboards/anavi/macropad8/keymaps/default/keymap.c

@@ -25,7 +25,7 @@ oled_rotation_t oled_init_user(oled_rotation_t rotation) {
 void oled_task_user(void) {
   // Host Keyboard Layer Status
   oled_write_ln_P(PSTR("ANAVI Macro Pad 8"), false);
-  oled_write_P(PSTR("Active layer:"), false);
+  oled_write_P(PSTR("Active layer: "), false);
 
   switch (get_highest_layer(layer_state)) {
     case _MAIN: