A "save as" dialog does not need to validate existence of the file.
When the user presses enter in the text field at the top, and the
text field contains a path to a directory, it usually means enter
the directory; but if the dialog is for choosing a directory, then
pressing enter will mean enter the directory if the dialog is not already
viewing that one, or else accept the current directory as the choice if
the table view does not have focus on some other row.
When the user presses enter in table view, go down into a directory
only if a directory is selected; otherwise accept the current selection.
When the user clicks a row in the table, copy the path of that row
into the text field so that it is possible to edit the path before
pressing Enter or OK (behavior similar to a native dialog that has
an editable path, such as GTK).

Task-number: QTBUG-39435
Change-Id: Ibd5e988624c5b1072a12239d681cbdc812e0a697
Reviewed-by: Liang Qi <liang.qi@theq...>

- Renamed LICENSE.LGPL to LICENSE.LGPLv21
- Added LICENSE.LGPLv3 & LICENSE.GPLv2
- Removed LICENSE.GPL

Change-Id: I470909ba0980db33ab551790d619c59a35978590
Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>

Change-Id: I5e06bdf03ba1ba8e5fe7669f690420dc9a039129
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

Replace a number of QtQml module inclusions with their more specific
counterparts, possibly leading to decreased compilation time.

Change-Id: I9b48b06e884d46c6440725a704951dc87e2e93db
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

Use a ComboBox for the filters.  Add a sidebar showing shortcuts for the
common paths and drives that the user will most likely need, and an
editable list of favorite paths.

[ChangeLog][QtQuickDialogs][FileDialog] The FileDialog fallback QML
implementation now uses QtQuick.Controls, and has added features
including a Combobox for file extension filters, and a sidebar with
common paths, drives/volumes and favorite paths.

Change-Id: I228ebdadcf338917db81a2b3d03d3c0b09584e7d
Reviewed-by: Liang Qi <liang.qi@digia.com>

This will enable using Controls in the QML dialog implementations.
For now, Controls are used only as drop-in replacements for the
Button, Checkbox, and TextField which were custom implementations
in the qtdeclarative module before.

Change-Id: Ic79e9e8e5715a72ce51f4c724bfdfd33653300f2
Reviewed-by: Liang Qi <liang.qi@digia.com>