This makes the config dialog more responsive when opening it multiple
times, and minimizes network traffic.
The equality check at the beginning of sourceRequestEvent was
completely wrong, if the source (DataContainer) was deleted-because-unused then
we need to proceed with the request even if it's the same as the
previous request. And if the request is ongoing then DataEngine
doesn't call us again, it connects to the existing source...
This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
techbase wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:
http://community.kde.org/Frameworks/GitOldHistory
If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.
Branched from the monolithic repo kde-workspace, frameworks branch, at commit
049113e719dd2fc4446d054fa1a3aada330094f0