allow right side modifiers to hold when pressed at the same time

Author: 280Zo

config/behaviors.dtsi

@@ -22,17 +22,6 @@
         //     hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38>;
         // };
 
-        // hm_left: homerow_mod_left {
-        //     compatible = "zmk,behavior-hold-tap";
-        //     #binding-cells = <2>;
-        //     flavor = "tap-preferred";
-        //     tapping-term-ms = <150>;
-        //     //quick-tap-ms = <200>;
-        //     // require-prior-idle-ms = <150>;
-        //     bindings = <&kp>, <&kp>;
-        //     hold-trigger-key-positions = <6 7 8 9 10 11 18 19 20 21 22 23 30 31 32 33 34 35 39 40>;
-        // };
-
         hm_a: homerow_mod_a {
             compatible = "zmk,behavior-hold-tap";
             #binding-cells = <2>;
@@ -75,7 +64,7 @@
             flavor = "tap-preferred";
             tapping-term-ms = <125>;
             bindings = <&kp>, <&kp>;
-            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38>;
+            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38 19 20 21 22>;
         };
 
         hm_e: homerow_mod_e {
@@ -84,7 +73,7 @@
             flavor = "tap-preferred";
             tapping-term-ms = <150>;
             bindings = <&kp>, <&kp>;
-            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38>;
+            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38 19 20 21 22>;
         };
 
         hm_i: homerow_mod_i {
@@ -93,7 +82,7 @@
             flavor = "tap-preferred";
             tapping-term-ms = <150>;
             bindings = <&kp>, <&kp>;
-            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38>;
+            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38 19 20 21 22>;
         };
 
         hm_o: homerow_mod_o {
@@ -102,7 +91,7 @@
             flavor = "tap-preferred";
             tapping-term-ms = <200>;
             bindings = <&kp>, <&kp>;
-            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38>;
+            hold-trigger-key-positions = <0 1 2 3 4 5 12 13 14 15 16 17 24 25 26 27 28 29 36 37 38 19 20 21 22>;
         };
 
         td_cursor: td_scroll_or_cursor {