Allow searches on Extra dictionaries
Always show confirmation dialog before upgrading
Custom left & right margins
Dictionary text font-family/font-size/line-height
FeatureSettings - BookSpecificStats
FeatureSettings - ExportHighlights
FeatureSettings - MyWords
Freedom to advanced fonts control
KePub constant font sharpness
KePub stylesheet additions
My 10 line spacing values
Shorten dictionary entry not found message
ePub constant font sharpness
Custom synopsis details line spacing
Custom synopsis font size
Dictionary pop-up - increase available text area
Increase Book Details synopsis area
Increase library cover size
Increase size of kepub chapter progress chart
Reduce new header/footer height
Reduce top/bottom page spacer
Remove footer (row3) and increase cover size on new home screen
I'll probably enable the new one that switches the header and footer when v54 comes out.