Prevent sub and sup from affecting line-height.

Set touch-action on .items to prevent browser navigation.

Move font-family specific CSS to the appropriate file.

Update primary font-family for UI to be even more
compatible with various operating systems.

Make .entry-content font-weight variable depending
on font-family used.

This will force the form to be populated with a valid token.

- Attempt to avoid awkward alignment on smartphone screens
- Keep the read/star actions aligned to the left
- Remove css flex to allow easier override with custom CSS

Deleting large users might lock the tables in the hosted offering

This reverts commit c9618458.

- Binds the 'R' key to trigger a refresh in the background for all
feeds.
- Updates the locale, using the same description as the link in the
feeds page.

Co-authored-by: Vitor Pellegrino <pellegrino@linux.com>

A new "shareCode" field is generated for each entry, and allows
unlogged users to access the entry through the /shared endpoint.
This feature is particularly useful to share articles from miniflux
to third-party users without having them to visit the original source.

The image proxy is disabled and special cache headers are proposed in
the shared page to avoid denial of service.

This adds the oauth2 provider `oidc`. It needs an additional argument, the OIDC discovery endpoint to figure out where the auth and token URLs are.

Configuration is similar to setting up the Google Authentication with these changes:

 * `OAUTH2_PROVIDER = oidc`
 * `OAUTH2_OIDC_DISCOVERY_ENDPOINT = https://auth.exampe.org/discovery` 

Auth Proxy allows to authenticate a user using an HTTP header provided
by an external authentication service. This provides a way to
authenticate users in miniflux using authentication schemes not
supported by miniflux itself (LDAP, non-Google OAuth2 providers, etc.)
and to implement SSO for multiple applications behind single
authentication service.

Auth Proxy header is checked for the '/' endpoint only, as the rest are
protected by the miniflux user/app sessions.

Closes #534

Signed-off-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>

Add a changed_at timestamp to the entries table. This field is updated
whenever the entry's metadata changes.

Align the information to the left side, and the actionable buttons to
the right.

See https://github.com/miniflux/miniflux/pull/531#issuecomment-578547488