message_edit: Fix cursor style on hover in edit area.

Fixes #3938.

web/src/message_list_hover.js

@@ -66,12 +66,12 @@ export function initialize() {
 
     $("#main_div").on("mouseover", ".sender_info_hover", function () {
         const $row = $(this).closest(".message_row");
-        $row.addClass("sender_name_hovered");
+        $row.addClass("sender_info_hovered");
     });
 
     $("#main_div").on("mouseout", ".sender_info_hover", function () {
         const $row = $(this).closest(".message_row");
-        $row.removeClass("sender_name_hovered");
+        $row.removeClass("sender_info_hovered");
     });
 
     function handle_video_preview_mouseenter($elem) {

web/styles/message_row.css

@@ -144,6 +144,7 @@ $time_column_min_width: 42px; /* + padding */
             ".      reactions .        . .   ";
 
         &.content_edit_mode {
+            cursor: default;
             /* Set the controls area to 0 to give more space
                to the edit/source view area. */
             grid-template-columns: $avatar_column_width minmax(0, 1fr) 0 8px minmax(

web/styles/zulip.css

@@ -2102,10 +2102,15 @@ td.pointer {
     }
 }
 
-.sender_name_hovered {
+.sender_info_hovered {
     .sender_name {
+        cursor: pointer;
         color: hsl(200deg 100% 40%);
     }
+
+    .message-avatar {
+        cursor: pointer;
+    }
 }
 
 .always_visible_topic_edit,