Adjust size of sponsor logos, including mobile view
Adjust size of sponsor logos, including mobile view

pyvec/cz.pycon.org-2017,benabraham/cz.pycon.org-2017,benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2017,benabraham/cz.pycon.org-2017,pyvec/cz.pycon.org-2016,pyvec/cz.pycon.org-2016,pyvec/cz.pycon.org-2017,pyvec/cz.pycon.org-2016