everforest-gtk-theme: patch out invalid property in gtk3 theme

pkgs/by-name/ev/everforest-gtk-theme/gtk3-remove-border-spacing.patch

@@ -0,0 +1,12 @@
+diff --git a/themes/src/sass/gtk/_common-3.0.scss b/themes/src/sass/gtk/_common-3.0.scss
+index 4148a1b4..735905e9 100644
+--- a/themes/src/sass/gtk/_common-3.0.scss
++++ b/themes/src/sass/gtk/_common-3.0.scss
+@@ -1119,7 +1119,6 @@ dropdown {
+ 
+ 	> button > box {
+ 		border-radius: 0 $modal-radius $modal-radius 0;
+-		border-spacing: $space-size;
+ 
+ 		> stack > row.activatable {
+ 			&:hover,

pkgs/by-name/ev/everforest-gtk-theme/package.nix

@@ -23,6 +23,9 @@ stdenvNoCC.mkDerivation {
     # remove when merged
     # https://github.com/Fausto-Korpsvart/Everforest-GTK-Theme/pull/34
     ./fix-install-script.patch
+    # remove when merged
+    # https://github.com/Fausto-Korpsvart/Everforest-GTK-Theme/pull/35
+    ./gtk3-remove-border-spacing.patch
   ];
 
   propagatedUserEnvPkgs = [