fix for bug #389491: have url bar autocomplete do a case insensitive search against both url and title with results orderded by a combination of last visited and visit count

also includes fixes for bugs:

#383672: after visiting http://cheese.livejournal.com/, typing livejournal in the urlbar should suggest http://cheese.livejournal.com/

#392141: strip trailing / leading whitespace before doing url bar autocomplete

#391887: typing "https://" no longer drops down a list of https sites

#390404: javascript: urls (and other urls) that I didn't type or click on are in url bar when I autocomplete

#385033: URLBar dropdown hangs and eats keystrokes when typing

#373256: URL/location bar autocomplete slowness (sqlite database doesn't seem to be cached)

r=dietrich

browser/themes/gnomestripe/browser/browser.css

@@ -965,6 +965,11 @@ statusbarpanel#statusbar-display {
   height: 16px;
 }
 
+.autocomplete-treebody::-moz-tree-image(bookmark, treecolAutoCompleteValue) {
+  width: 16px;
+  height: 16px;
+}
+
 .autocomplete-treebody::-moz-tree-cell-text(treecolAutoCompleteComment) {
   color: #555566;
 }