Changes for lecture

[jacekkopecky]

This combines #11, #13, #16, #17, #18, to be adopted commit-by-commit in the lecture.

To go from commit to commit, do the following one by one, provided you start in clean master:

# add favicon
git merge --ff-only 2dea001b96e54d8d8eea168ccf050e3ab7f389b6
# move results up top
git merge --ff-only 43926dfadfa65bd2422287f818118d6f0053520f
# specify tab order, move % to CSS
git merge --ff-only 58358d73ac86cab557eb93b60de36a71fb768d7d
# add light/dark preference
git merge --ff-only d4e405e520a2052c504b9639a484529501342f3a
# add link to source
git merge --ff-only 31e576ee0438105b4743d290bf16f69834296728
# enable offline use and app installation
git merge --ff-only a2ae79184b2575a6ea06db992df2dae56c7d12ab
# Add GPA
git merge --ff-only 579758b369b92c7fff6fb943eaa85c4ce4e4b83a
# add share link
git merge --ff-only fa93beb8dd2ae276315baf5c1b176d9adfa1af96