[Keymap] Update personal userspace and keymaps (#4963)

* Remove duplicated or unnecessary definitions in config.h and rules.mk

* Use IS_HOST_LED_ON() macro

* Add mouse acceleration to kbd6x:konstantin keymap

* Clear and restore mods when sending macros

* Make SEND_STRING_CLEAN a config option

* Add NO_ACTION_ONESHOT to userspace config

users/konstantin/konstantin.h

@@ -25,6 +25,16 @@
 
 #define LCT_CPS LCTL_T(KC_CAPS)
 
+#ifdef SEND_STRING_CLEAN
+  #undef  SEND_STRING
+  #define SEND_STRING(...) {            \
+      uint8_t ss_mods = get_mods();     \
+      clear_mods();                     \
+      send_string_P(PSTR(__VA_ARGS__)); \
+      set_mods(ss_mods);                \
+    }
+#endif
+
 enum keycodes_user {
   CLEAR = SAFE_RANGE,
 #ifdef LAYER_NUMPAD