applications: another useful flag for chromium

applications: shortcut for a better incognito mode in chromium

.vimrc: use pyflakes3 for python 3

.htoprc: show i/o in bytes/s, highlight program paths and threads

.hgrc: don't default to curses ui, but add an alias for "crecord"

.bashrc: reindent completion if-block

.bashrc: write out a proper if-else-fi block instead of x && y || z

.vimrc: signify is OK

.hgrc: have a committemplate and use it in .hgeditor for showing diff

.hgeditor: modernize syntax and fix shellcheck warnings