remove background color of modal

https://youtrack.weseek.co.jp/issue/GW-7799
- Move emoji-picker-modal css class to _apply-colors.scss

packages/app/src/styles/_on-edit.scss

@@ -384,10 +384,3 @@ body.on-edit {
     }
   }
 }
-
-/*
-Emoji picker modal
-*/
-.emoji-picker-modal {
-  background-color: transparent !important;
-}

packages/app/src/styles/theme/_apply-colors.scss

@@ -701,3 +701,10 @@ mark.rbt-highlight-text {
   height: 7px;
   background-color: $primary;
 }
+
+/*
+Emoji picker modal
+*/
+.emoji-picker-modal {
+  background-color: transparent !important;
+}