Properly handle if missing title tag when write offline. The title eg. `Untitled post: Sunday, 17 December 2023, 18:53`

$_SERVER['REQUEST_URI'] is always url-encoded so we decoded it back before save it as a cache file.

Allows us to reuse previous uploaded images.
​

See  #564

Add SECURITY.md also fix unexpected behavior with tags in number. See #614

Add last modified time variable (eg. $p->lastMod). Add fallback just in case the tags count not the same.

sort the dropdown list of categories alphabetically when editing a post

Add the common date format in German speaking countries: dd.mm.yyyy

sort the dropdown list of categories alphabetically when adding or editing a post

i18n for 'Name'

i18n for 'Views'