The aim here is to tidy up the reply component and make it so it sizes automatically without any need to manually set widths or heights. This is achieved by putting the layout in a grid layout. The implicitwidth and height variables are also simplified meaning that the margins are no longer prone to being slightly off because the calculation didn't add up the margins and spacing right.
Also added here is a mime component which is used to provide a nicer representation for files, videos and audio in the reply because trying to put the full component in wouldn't look good.
This also fixes the situation in right to left mode where the layout now mirror properly and everything sits where it should.
New reply elements
This makes (https) links show up as actual links when they're in a message with a `formatted_body`. For example, the pursuivant messages in any KDE channel (like #kirigami), or links which are in a reply to another message/image.
Also corrected a regex mistake in another place using the same link replacement regex.
Fix#331
When using Breeze light:
| Before | After |
| ------ | ------ |
|  |  |
When hovering over a link without a target, qt5 will report the link target to be "1", which is wrong.
To work around this, we manually check if the link is "1" and if it is, we discard it.
In theory, this means that we won't get a preview for any link that actually *is* "1", but why would any link be "1"?
It's not worth reporting this to Qt since it seems fixed in Qt6
BUG: 456877
Implement showing a long datetime as a tooltip when hovering over the timestamp for a message. The timestamp is also moved to just after the username of the poster this means it will not be under the hover buttons unless the message is very short.
Also some cleanup of the alignment of items in the bubble. The reply text is now indented the same amount as the username and message and the padding isn't removed from the username and message when avatars are disabled.
Implements: network/neochat#223
