expand disclaimer re unsolicited application materials
small tweaks, formatting, etc.
add resource: 2023 talk @ CIRM-Luminy
add missing file: bonn-logo.png
fix proportions of uni logos
replace unam's logo by one with name
replace nagoya-logo by one with uni's name
replace lu-logo- by version in en
update CFL's thesis title
add clarifying rmk re academical career
adapt uni logo's width for small screens
remove border from back-to-top button
improve back-to-top button
change colour of back-to-top button to black
make back-to-top button more visible