[ICONS][Edit] Add icon class twig block

[CSS] Move edit feed link aligment rules to base.css

public/assets/default_theme/css/base.css

@@ -209,6 +209,11 @@ li {
     fill: var(--foreground);
 }
 
+.edit-feed-link {
+    display: block;
+    float: right;
+}
+
 .active {
     font-weight: bold;
 }

public/assets/default_theme/css/pages/feeds.css

@@ -341,8 +341,3 @@ embed header {
 .note-complementary a {
     font-weight: bold;
 }
-
-.edit-feed-link {
-    display: block;
-    float: right;
-}

public/assets/icons/edit.svg.twig

@@ -3,7 +3,7 @@
 
 <!-- MIT License -->
 
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16">
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" class="{{ iconClass|default('') }}">
   <title>Edit</title>
   <path d="M11.013 1.427a1.75 1.75 0 012.474 0l1.086 1.086a1.75 1.75 0 010 2.474l-8.61 8.61c-.21.21-.47.364-.756.445l-3.251.93a.75.75 0 01-.927-.928l.929-3.25a1.75 1.75 0 01.445-.758l8.61-8.61zm1.414 1.06a.25.25 0 00-.354 0L10.811 3.75l1.439 1.44 1.263-1.263a.25.25 0 000-.354l-1.086-1.086zM11.189 6.25L9.75 4.81l-6.286 6.287a.25.25 0 00-.064.108l-.558 1.953 1.953-.558a.249.249 0 00.108-.064l6.286-6.286z"/>
 </svg>