Add standard definitions for ALGR and KC_ALGR (#4389)

* Add standard ALGR defition, remove (re)definitions from language files

* Use ALGR(kc) consistently in ALTGR(kc) aliases

* Non-Nordic keymaps should not use NO_ALGR

* Add standard KC_ALGR definition

* Update docs with ALGR and KC_ALGR

* Update SS_ALGR and ALGR_T aliases

1 files changed, 3 insertions, 2 deletions

diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index 7670d53e9..283b4a65c 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -470,6 +470,7 @@ enum quantum_keycodes {
 #define RCTL(kc) (QK_RCTL | (kc))
 #define RSFT(kc) (QK_RSFT | (kc))
 #define RALT(kc) (QK_RALT | (kc))
+#define ALGR(kc) RALT(kc)
 #define RGUI(kc) (QK_RGUI | (kc))
 #define RCMD(kc) RGUI(kc)
 #define RWIN(kc) RGUI(kc)
@@ -480,7 +481,7 @@ enum quantum_keycodes {
 #define SGUI(kc) (QK_LGUI | QK_LSFT | (kc))
 #define SCMD(kc) SGUI(kc)
 #define SWIN(kc) SGUI(kc)
-#define LCA(kc) (QK_LCTL | QK_LALT | (kc))
+#define LCA(kc)  (QK_LCTL | QK_LALT | (kc))
 
 #define MOD_HYPR 0xf
 #define MOD_MEH 0x7
@@ -645,7 +646,7 @@ enum quantum_keycodes {
 #define ALT_T(kc) MT(MOD_LALT, kc)
 #define LALT_T(kc) MT(MOD_LALT, kc)
 #define RALT_T(kc) MT(MOD_RALT, kc)
-#define ALGR_T(kc) MT(MOD_RALT, kc) // dual-function AltGR
+#define ALGR_T(kc) RALT_T(kc)
 
 #define GUI_T(kc) MT(MOD_LGUI, kc)
 #define CMD_T(kc) GUI_T(kc)