Update dependencies and release binaries for FreeBSD and OpenBSD too

Show error when serving fails for whatever reason

Update gin and its dependencies

Update secrets dependency for sorting secrets properly

• Upgrade gin-gonic/gin 1.4.0 -> 1.7.2 due to CVE-2020-28483

• Disable caching of all non-static assets

• Log out after inactivity even when system goes to sleep and resumes from it

• Fix the problem of modal dialogs not closing every time
• Show all secrets by default after login

• Clear filtered secrets list when deleting filter
• Set focus automatically to text fields
• Bump secrets dependency
  • vault aliases are now case-insensitive
  • vault files are locked when writing to disallow accidental parallel writes

• Fix so that all browser security headers would be set correctly by gin-contrib/secure middleware