feat: Emoji mart style update

https://youtrack.weseek.co.jp/issue/GW-7732
- Removed button anchor style and root button
- Added style for selected anchor bar height and color

packages/app/src/styles/_emoji-mart.scss

@@ -3,15 +3,6 @@ nav.emoji-mart-anchors {
   display: flex !important;
 }
 
-button.emoji-mart-anchors {
-  display: inline-block !important;
-  color: #858585 !important;
-}
-
-:root button {
-  overflow: hidden;
-}
-
 .emoji-mart-category {
   .emoji-mart-emoji span {
     cursor: pointer !important;

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

@@ -738,3 +738,20 @@ mark.rbt-highlight-text {
   height: 7px;
   background-color: $primary;
 }
+
+/**
+  Emoji mart style
+*/
+.emoji-mart {
+  .emoji-mart-anchor-selected {
+    .emoji-mart-anchor-bar {
+      height: 3px;
+    }
+    svg {
+       fill: $purple;
+    }
+  }
+  .emoji-mart-anchor-bar {
+    height: 0px;
+  }
+}