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This reverts commit 41f69bb49bd5b4789c2fd53e57815e55c4100a6a.

Signed-off-by: Scott Petrovic <scottpetrovic@gmail.com>

Signed-off-by: Scott Petrovic <scottpetrovic@gmail.com>

BUG:339570

while being derived from KoToolBase, they expect certain subclasses for
passed objects like the canvas, so will crash if used with the wrong
applications

REVIEW: 120342

Thanks boud and zagge for review

Only enable the ones that can actually save themselves.

The duotone specfication block for grayscale images was already loaded
as an annotation; save it as well. Also check whether there are any
PSD image resource block annotations there are and save those.

This should fully roundtrip all image resource blocks.

Thanks to Ben Cooksley for the hint.

On OSX, we use the save dialog in non-static mode. In this mode,
if you add name filters to the dialog that contain duplicate entries,
Qt gets very confused.

If you add:

jpg, png, tif, exr, png

QFileDialog will show

jpg, tif, exr, png

But selecting tif will actuall select png.

Now you can undo actions even when you editing source points
position.

Prevents creation of a new string and thus memalloc, as the current string
memory is reused with QString::remove(), see
https://qt.gitorious.org/qt/qt/source/d1b700ef29ab95ac999a9644f1b3c62333f8da19:src/corelib/tools/qstring.cpp#L1722

Did not touch modification code for strings which are kept around for longer
as I have no clue if this optimization is paid with higher memory needs
in total.

BUG:339463

REVIEW: 120384

Thanks boud for quick review