[Backport] Fix issue #4069: delete icon of wiki links doesn't work

app/coffee/modules/wiki/nav.coffee

@@ -77,7 +77,7 @@ WikiNavDirective = ($tgrepo, $log, $location, $confirm, $navUrls, $analytics, $l
                 $el.find(".new input").focus()
                 $el.find(".add-button").hide()
 
-            $el.on "click", ".wiki-link .icon-delete", (event) ->
+            $el.on "click", ".js-delete-link", (event) ->
                 event.preventDefault()
                 event.stopPropagation()
                 target = angular.element(event.currentTarget)

app/partials/wiki/wiki-nav.jade

@@ -8,7 +8,7 @@ nav
       a(title!="<%- link.title %>")
           span.link-title <%- link.title %>
           <% if (deleteWikiLinkPermission) { %>
-          svg.icon.icon-trash
+          svg.js-delete-link.icon.icon-trash
               use(xlink:href="#icon-trash")
           <% } %>
       input(type="text" placeholder="{{'COMMON.FIELDS.NAME' | translate}}" class="hidden" value!="<%- link.title %>")