Merge pull request 'Fix E_NOTICE in add_handler().' (#20) from JustAMacUser/tt-rss:fix-addhandler-notice into master

Reviewed-on: https://git.tt-rss.org/fox/tt-rss/pulls/20

Merge pull request 'Set orm and pdo mysql charset on connection' (#19) from Gravemind/tt-rss:fix-mysql-charset into master

Reviewed-on: https://git.tt-rss.org/fox/tt-rss/pulls/19

 * af_redditimgur: reparent generated iframes outside of post table

Merge pull request 'Add coalescing operator to otp_enabled when changing user password' (#18) from klempin/tt-rss:fix/undefined-array-key into master

Reviewed-on: https://git.tt-rss.org/fox/tt-rss/pulls/18

Currently translated at 100.0% (660 of 660 strings)

Translation: Tiny Tiny RSS/messages
Translate-URL: https://weblate.tt-rss.org/projects/tt-rss/messages/cs/

 * add HOOK_HEADLINES_RENDERED