js: standardize width of dialog boxes.

Increase width of artist commentary dialog, saved search dialog, and
favgroups dialog to 700px (the width that most other dialog boxes use).

app/javascript/src/javascripts/artist_commentaries.js

@@ -31,7 +31,7 @@ ArtistCommentary.initialize_commentary_display_tabs = function() {
 ArtistCommentary.initialize_edit_commentary_dialog = function() {
   $("#add-commentary-dialog").dialog({
     autoOpen: false,
-    width: 500,
+    width: 700,
     buttons: {
       "Submit": function() {
         $("#add-commentary-dialog #edit-commentary").submit();

app/javascript/src/javascripts/favorite_groups.js

@@ -9,7 +9,7 @@ FavoriteGroup.initialize_all = function() {
 FavoriteGroup.initialize_add_to_favgroup_dialog = function() {
   $("#add-to-favgroup-dialog").dialog({
     autoOpen: false,
-    width: 500,
+    width: 700,
     buttons: {
       "Cancel": function() {
         $(this).dialog("close");

app/javascript/src/javascripts/posts.js.erb

@@ -574,7 +574,7 @@ Post.initialize_saved_searches = function() {
   });
 
   $("#save-search-dialog").dialog({
-    width: 500,
+    width: 700,
     modal: true,
     autoOpen: false,
     buttons: {