reorganize class name and styles

src/client/styles/scss/_page_list.scss

@@ -72,13 +72,3 @@ body .page-list {
     background-color: $gray-300;
   }
 }
-
-.grw-page-list-m {
-  .grw-page-list-title-m {
-    svg {
-      width: 35px;
-      height: 35px;
-      margin-bottom: 6px;
-    }
-  }
-}

src/client/styles/scss/_user.scss

@@ -43,3 +43,13 @@ $easeInOutCubic: cubic-bezier(0.65, 0, 0.35, 1);
     }
   }
 }
+
+.user-page {
+  .grw-user-page-header {
+    svg {
+      width: 35px;
+      height: 35px;
+      margin-bottom: 6px;
+    }
+  }
+}

src/server/views/layout-growi/user_page.html

@@ -21,7 +21,7 @@
     <div class="container-lg">
 
       <div class="grw-page-list-m mt-5 pb-5 d-edit-none">
-        <h2 class="grw-page-list-title-m border-bottom pb-2 mb-3" id="bookmarks-list">
+        <h2 class="grw-user-page-header border-bottom pb-2 mb-3" id="bookmarks-list">
           <i id="user-bookmark-icon"></i>
           Bookmarks
         </h2>
@@ -32,7 +32,7 @@
       </div>
 
       <div class="grw-page-list-m mt-5 pb-5 d-edit-none">
-        <h2 class="grw-page-list-title-m border-bottom pb-2 mb-3" id="recently-created-list">
+        <h2 class="grw-user-page-header border-bottom pb-2 mb-3" id="recently-created-list">
           <i id="recent-created-icon"></i>
           Recently Created
         </h2>