fix missing filters on status tab when user swithches to another state

app/assets/javascripts/issues.js.coffee

@@ -26,6 +26,20 @@
 
     $(".selected_issue").bind "change", Issues.checkChanged
 
+  # Update state filters if present in page
+  updateStateFilters: ->
+    stateFilters =  $('.issues-state-filters')
+    newParams = {}
+    paramKeys = ['author_id', 'label_name', 'milestone_title', 'assignee_id', 'issue_search']
+
+    for paramKey in paramKeys
+      newParams[paramKey] = getUrlParameter(paramKey) or ''
+
+    if stateFilters.length
+      stateFilters.find('a').each ->
+        initialUrl = $(this).attr 'href'
+        $(this).attr 'href', mergeUrlParams(newParams, initialUrl)
+
   # Make sure we trigger ajax request only after user stop typing
   initSearch: ->
     @timer = null
@@ -54,6 +68,7 @@
         # Change url so if user reload a page - search results are saved
         history.replaceState {page: issuesUrl}, document.title, issuesUrl
         Issues.reload()
+        Issues.updateStateFilters()
       dataType: "json"
 
   checkChanged: ->

app/assets/javascripts/lib/url_utility.js

+function getUrlParameter(sParam) {
+  var sPageURL = decodeURIComponent(window.location.search.substring(1)),
+      sURLVariables = sPageURL.split('&'),
+      sParameterName,
+      i;
+
+  for (i = 0; i < sURLVariables.length; i++) {
+    sParameterName = sURLVariables[i].split('=');
+
+    if (sParameterName[0] === sParam) {
+      return sParameterName[1] === undefined ? true : sParameterName[1];
+    }
+  }
+}
+
+/**
+ * @param {Object} params - url keys and value to merge
+ * @param {String} url
+ */
+function mergeUrlParams(params, url){
+  var newUrl = decodeURIComponent(url);
+
+  Object.keys(params).forEach(function(paramName) {
+    var pattern = new RegExp('\\b('+paramName+'=).*?(&|$)')
+    if (url.search(pattern) >= 0){
+      newUrl = newUrl.replace(pattern,'$1' + params[paramName] + '$2');
+    } else {
+      newUrl = newUrl + (newUrl.indexOf('?') > 0 ? '&' : '?') + paramName + '=' + params[paramName]
+    }
+  });
+
+  return newUrl;
+}
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