Queries are now always executed on correct database instance.
Databases are also stored in thread local storage instead of in hash
table with mutex.
Closes#2498
Skip updating completion model with invalid data from canceled jobs,
which could result in attempt to resize the completer popup to invalid
size (0 height) and when the popup is resized again to valid size kwin
may actually fail to show it with compositing enabled.
Should help with #2480
The code to change color of host of url is completely new.
It doesn't use any paint hacks anymore. That means text in
locationbar will now be always rendered pixel perfect, as it would
with normal QLineEdit.
Cleanup in LocationCompleter. It is now using QCompleter in inline
mode to complete domain. It is still not ideal, eg. it refreshes
and show the domain completion with delay (job run in separate thread),
and sometimes it misses it completely.
WebSearchBar: Always complete when receiving suggestions. Fix issue
when suggestions were only showed after typing at least 2 characters.
Currently, there is one issue with inline domain completion. It is
also searched from the separate thread, and thus it gets displayed
after a small delay.
Closes#1135
