Conversion: When converting SVG images for formats that do not support SVG and the SVG has an invalid viewBox, ignore the viewBox instead of aborting conversion
Conversion: Fix parsing of HTML 5 documents that are also valid XML but use non-namespaced inline svg
Bulk metadata edit search and replace: Do not allow the user to perform the search and replace until she enters a search expression. See #1282357 (error produced during "Edit metadata in bulk" for replacing a value)
Nicer icon for beautify file

From http://findicons.com/icon/207143/flower?id=207153 (freeware
non-commercial)
Edit book: Fix an error that occurs if more than 100 checkpoints are created. Fixes #1282583 [book editor error when adding 100 items](https://bugs.launchpad.net/calibre/+bug/1282583)