Move repeated code into $.modifiedClick.

src/General/Index.coffee

@@ -297,7 +297,7 @@ Index =
           Index.pageLoad()
 
     pageNav: (e) ->
-      return if e.shiftKey or e.altKey or e.ctrlKey or e.metaKey or e.button isnt 0
+      return if $.modifiedClick e
       switch e.target.nodeName
         when 'BUTTON'
           e.target.blur()

src/Images/ImageExpand.coffee

@@ -41,7 +41,7 @@ ImageExpand =
 
   cb:
     toggle: (e) ->
-      return if e.shiftKey or e.altKey or e.ctrlKey or e.metaKey or e.button isnt 0
+      return if $.modifiedClick e
       post = Get.postFromNode @
       {file} = post
       return if file.isExpanded and ImageCommon.onControls e

src/Miscellaneous/ExpandThread.coffee

@@ -29,7 +29,7 @@ ExpandThread =
       ExpandThread.setButton thread
 
   cbToggle: (e) ->
-    return if e.shiftKey or e.altKey or e.ctrlKey or e.metaKey or e.button isnt 0
+    return if $.modifiedClick e
     e.preventDefault()
     ExpandThread.toggle Get.threadFromNode @
 

src/Quotelinks/QuoteInline.coffee

@@ -30,7 +30,7 @@ QuoteInline =
       href: link.href
 
   toggle: (e) ->
-    return if e.shiftKey or e.altKey or e.ctrlKey or e.metaKey or e.button isnt 0
+    return if $.modifiedClick e
 
     {boardID, threadID, postID} = Get.postDataFromLink @
     return if Conf['Inline Cross-thread Quotes Only'] and g.VIEW is 'thread' and g.posts["#{boardID}.#{postID}"]?.nodes.root.offsetParent # exists and not hidden

src/platform/$.coffee

@@ -254,6 +254,9 @@ do ->
       root.dispatchEvent new CustomEvent event, {bubbles: true, detail: clone detail}
 <% } %>
 
+$.modifiedClick = (e) ->
+  e.shiftKey or e.altKey or e.ctrlKey or e.metaKey or e.button isnt 0
+
 $.open = 
 <% if (type === 'userscript') { %>
   if GM_openInTab?