The rationale is explained in https://planet.kde.org/friedrich-kossebau-2023-06-28-include-also-moc-files-of-headers/
In case of KDEConnect, it impressively speeds up compilation. Before it
took 390 seconds on a clean build and with this change it took 330 seconds.
This is due to the mocs_compilation having to include the header files
and thus all their headers. Due to the lots of small plugins we have,
this means that the same headers must be compiled plenty of times.
When we include the moc files directly in the C++ file, they are already
available.
In theory we support Qt 5.6 (because of SailfishOS) but in practice we are not checking that in the CI so probably we broke the compatibility long ago. Also, I don't think anyone is using this code in SailfishOS, so we can greatly simplify the code by requiring Qt 5.15 or later.
The `QElapsedTimer` was never started. Clean it up somewhat and use a dedicated
250ms timer for reporting transferred bytes periodically (like KIO does it) and
1000ms for calculating speed so it's not as erratic.
Furthermore, report final numbers in `slotResult` rather than complicating
`slotProcessedAmount` for that.
Also, fix typo "send" -> "sent"
* Set magic `destUrl` property to let it know the job destination in case of
multiple files being transferred
* Set a normal "Receiving File(s)" title like we do with "Copying" title
* Set device name and destination path as details
