When selecting photos for upload one can select only one photo at once. However, it is possible to upload multiple photos using this method but each file has to be added separately. (There is also the upload zipped photos option but it is not very user-friendly.)
Would it be possible to use <input type=file multiple=true> instead of <input type=file multiple=false>?
More info:
http://www.w3schools.com/html5/att_input_multiple.asp
http://www.w3.org/TR/html-markup/input.file.html
Thanks a lot in advance!