Allow uppercase letters to send toggles.
Allow uppercase letters to send toggles.

The slideshow containing the docs says pushing "P" will toggle presenter mode. This is in fact only true when you push "p", so without shift. This fix makes sure both "P" and "p" are correct. This will cause less confusion.
gnab/remark,mariojp/remark,FabioBeneditto/remark,ghoshbinayak/nodeppt,bkeepers/remark,tilast/service-objects,programath/remark,reyhansofian/remark,saadatqadri/remark,lucamaraschi/pressenter,shigemk2/remark,xiaoking/remark,noname007/remark,emi80/remark,bkeepers/remark,GerHobbelt/remark,bytezen/remark,tilast/service-objects,doctoryes/remark,tripu/remark,saadatqadri/remark,tripu/remark,GerHobbelt/remark,noname007/remark,doctoryes/remark,jeromecc/rmll2015madagascar,ghoshbinayak/nodeppt,lucamaraschi/pressenter,FabioBeneditto/remark,gnab/remark,programath/remark,kwangkim/remark,emi80/remark,shigemk2/remark,tkraak/remark,JPry/remark,kwangkim/remark,mariojp/remark,jeromecc/rmll2015madagascar,bytezen/remark,reyhansofian/remark,tkraak/remark,imouren/remark,JPry/remark,xiaoking/remark,imouren/remark