Changes the width of sidebar in issues and MRs when affix event fires

app/assets/javascripts/issue.js.coffee

@@ -22,3 +22,7 @@ class @Issue
           @top = ($('.issuable-affix').offset().top - 70)
         bottom: ->
           @bottom = $('.footer').outerHeight(true)
+      $('.issuable-affix').on 'affix.bs.affix', ->
+        $(@).width($(@).outerWidth())
+      .on 'affixed-top.bs.affix affixed-bottom.bs.affix', ->
+        $(@).width('')

app/assets/javascripts/merge_request.js.coffee

@@ -26,6 +26,10 @@ class @MergeRequest
           @top = ($('.issuable-affix').offset().top - 70)
         bottom: ->
           @bottom = $('.footer').outerHeight(true)
+      $('.issuable-affix').on 'affix.bs.affix', ->
+        $(@).width($(@).outerWidth())
+      .on 'affixed-top.bs.affix affixed-bottom.bs.affix', ->
+        $(@).width('')
 
   # Local jQuery finder
   $: (selector) ->
@@ -164,4 +168,3 @@ class @MergeRequest
           else
             setTimeout(merge_request.mergeInProgress, 3000)
       dataType: 'json'
-