Merge branch 'jirka/max-points' into 'devel'

db/db.ddl

db/upgrade-20210307.sql

mo/db.py

mo/imports.py

mo/web/org_contest.py

mo/web/org_round.py

mo/web/templates/org_contest.html

mo/web/templates/org_round.html

mo/web/templates/org_submit_list.html

mo/web/templates/parts/org_solution_table.html

static/mo.css