mapFromSource() didn't work as expected, when used in lessThan(), it sometimes
returns an invalid QModelIndex.
A crash is observed when filtering source model via filterAcceptsRow() in #7952,
the crash is due to endless recursive of filterAcceptsRow() & lessThan() calling
each other and mapFromSource() is the culprit of it.
* NaturalCompare now returns compare result instead of "less than" result
* Change to stable sort in GUI components
* Add Utils::String::naturalLessThan() helper function
* Use Qt::CaseSensitivity type
A small fix belonging to #2531.
During the sorting empty QDateTime values are shuffled around due to
unstable sort in QSortFilterProxyModel (see #2526 and #2158), causing
the transfer list items to constantly change order.
Fixed by using an already existing correct comparison (with a torrent
hash fallback).
The current sorting algorithm is not stable and causes undesidered
rearrangements of the transfer list when different torrents have same
values in respect to the current sorting criterion. Fix this by using
the priority, the seed date and the hash of the torrents as fallback
values to determine the order.
Closes#2158.
Closes#2526.
Change project directory structure according to application structure.
Change 'nox' configuration option to something more meaningful 'nogui'.
Rename 'Icons' folder to 'icons' (similar to other folders).
Partially add 'nowebui' option support.
Remove QConf project file.
