Revert "Default to utility panel."

This reverts commit 29716db.

Author: dkocher

defaults/src/main/resources/default.properties

@@ -126,7 +126,7 @@ browser.delete.trash=true
 browser.filesize.decimal=false
 browser.date.natural=true
 
-bookmark.window.popover=false
+bookmark.window.popover=true
 bookmark.protocol.configurable=true
 bookmark.name.configurable=true
 bookmark.labels.configurable=true