Move delete button style to base.less in theme package

packages/rocketchat-theme/assets/stylesheets/base.less

@@ -3079,6 +3079,15 @@ a.github-fork {
 			float: left;
 			color: #444;
 			margin-right: 10px;
+
+			&.file-delete {
+				float: right;
+				padding-top: 10px;
+				&:hover {
+					color: red;
+					cursor: pointer;
+				}
+			}
 		}
 	}
 }

packages/rocketchat-ui-flextab/flex-tab/tabs/uploadedFilesList.html

@@ -1,11 +1,4 @@
 <template name="uploadedFilesList">
-	<style>
-		i.red-hover:hover
-		{
-			color: red;
-            cursor: pointer;
-		}
-	</style>
 	<div class="content">
 		<div class="list-view uploaded-files-list">
 			<div class="status">
@@ -15,7 +8,7 @@
 				{{#each files}}
 					<li>
 						{{#if canDelete}}
-                        <i class="icon-trash red-hover" style="float: right; padding-top: 10px;"></i>
+                        <i class="icon-trash file-delete"></i>
 						{{/if}}
 						<a title="{{escapedName}}" href="{{url}}" target="_blank" class="room-file-item {{customClassForFileType}}">
 							<i class="{{getFileIcon type}}"></i>