Fixed small twitter ui/usability issues.

app/assets/javascripts/app/controllers/_channel/twitter.coffee

@@ -211,6 +211,8 @@ class AccountEdit extends App.ControllerModal
       )
 
     addSearchTerm = =>
+      params = @getParams()
+      @searchTerms = params.search || []
       @searchTerms.push
         term: ''
         group_id: ''
@@ -219,6 +221,8 @@ class AccountEdit extends App.ControllerModal
 
     removeSearchTerm = (event) =>
       index = $(event.currentTarget).attr('data-index')
+      params = @getParams()
+      @searchTerms = params.search || []
       @searchTerms.splice(index, 1)
       renderSearchTerms()
 
@@ -249,13 +253,7 @@ class AccountEdit extends App.ControllerModal
     content.find('.js-directMessagesGroup').replaceWith createGroupSelection(@channel.options.sync.direct_messages.group_id, 'direct_messages')
     content
 
-  onClosed: =>
-    return if !@isChanged
-    @isChanged = false
-    @load()
-
-  onSubmit: (e) =>
-    @formDisable(e)
+  getParams: =>
     params = @formParams()
     search = []
     position = 0
@@ -269,12 +267,21 @@ class AccountEdit extends App.ControllerModal
           position += 1
       else
         search.push params.search
+    params.search = search
     if params.track_retweets
       params.track_retweets = true
     else
       params.track_retweets = false
-    params.search = search
-    @channel.options.sync = params
+    params
+
+  onClosed: =>
+    return if !@isChanged
+    @isChanged = false
+    @load()
+
+  onSubmit: (e) =>
+    @formDisable(e)
+    @channel.options.sync = @getParams()
     @ajax(
       id:   'channel_twitter_update'
       type: 'POST'

app/models/channel/driver/twitter.rb

@@ -222,6 +222,8 @@ returns
     if sync['search']
       hashtags = []
       sync['search'].each do |item|
+        next if item['term'].blank?
+        next if item['group_id'].blank?
         hashtags.push item['term']
       end
       filter[:track] = hashtags.join(',')
@@ -253,7 +255,7 @@ returns
       next if @stream_client.tweet_limit_reached(tweet, 2)
 
       # check if it's mention
-      if sync['mentions'] && sync['mentions']['group_id'] != ''
+      if sync['mentions'] && sync['mentions']['group_id'].present?
         hit = false
         if tweet.user_mentions
           tweet.user_mentions.each do |user|
@@ -272,6 +274,8 @@ returns
       if sync['search'] && tweet.hashtags
         hit = false
         sync['search'].each do |item|
+          next if item['term'].blank?
+          next if item['group_id'].blank?
           tweet.hashtags.each do |hashtag|
             next if item['term'] !~ /^#/
             if item['term'].sub(/^#/, '') == hashtag.text
@@ -290,7 +294,8 @@ returns
         hit = false
         body = tweet.text
         sync['search'].each do |item|
-          next if item['term'] =~ /^#/
+          next if item['term'].blank?
+          next if item['group_id'].blank?
           if body =~ /#{item['term']}/
             hit = item
           end