RRset GUI Improvements - Githubissues

Those are leftover from #420

[x] pagination is broken for 500+ rows (#584)
[x] add units to TTL field
[x] make TTL an integer field (currently it's a float); validate for minimum TTL
[x] change-state indicator per row
[x] saving success feedback per row
[ ] in "multi-field" record content fields pasting cannot be undone
[ ] in "multi-field" record content fields selecting across fields is not possible
[x] in "multi-field" record content fields selecting with shift + end is broken in Firefox
[x] in record content fields, pasting of multiple lines at a time is broken
[x] rows can be saved even though client-validation did not go through
[ ] domain names can be crafted such that unwanted API requests are send (while not immediately a security issue, let's check at least if the domain name is sound)
[x] If you add a too long TXT record in the 'create new' dialog, the error message will contain the faulty value, resulting in content overflow in the error message. The error message field should have it's overflow setting such that it breaks the line.
[x] add a way to tell whether a row has changed, and visual feedback on saving (including when hitting Enter, and including error conditions).

For some points, discussion in #420 has some additional thoughts and/or technical notes

desec-io / desec-stack