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This reverts commit edc1422c7e023b71e766d4ac368433c9e4064e73.

# Conflicts:
#	src/common.cpp
#	src/directorymergewindow.cpp
#	src/fileaccess.cpp
#	src/kdiff3.cpp
#	src/kdiff3_part.cpp
#	src/kdiff3_shell.cpp
#	src/main.cpp
#	src/optiondialog.cpp
#	src/smalldialogs.cpp

- Some steps towards Qt5 compilability - Improving interruptability while recalculating word wrap - Fixed diff-ext makefile
Signed-off-by: Joachim Eibl <joachim.eibl@gmx.de>

git-svn-id: https://kdiff3.svn.sourceforge.net/svnroot/kdiff3/trunk@169 c8aa9fed-2811-0410-8543-893ada326672

QString::null is depriated as of QT 5.9. Use QString() instead. Non-breaking change. Tecnically the second parameter iof KHelpClient::invokeHelp isn't even needed as will defualt to QString(). Leaving it for clarity sake.
Signed-off-by: Michael Reeves <reporter123@users.noreply.github.com>

Don't use std:reverse sort correctly the first time. Since we have to sort anyway.
remove unused param sortColumn where not required by Qt API

Seriously how did this ever work.
*Scrat unneeded KReplacement check.

This is defined and used sololy by our code. Not KDE/QT.

These nothing windows specific about a QT program displaying a dialog.
Don't assume we were launched from the console just because it exists.
This is especially true for OS X.

*QFileDialog program to crash on exit inside Qt
--Qt bug.

--Uncovered one missing module.
*scrat deprecated headers no longer needed

*Update readme.

*refactor argument handling while where at it.

*scrat unneeded code.

*#if class that is not normally used
 TODO: Reexamine KREPLACEMENTS_H and attendent #ifdefs
*set some things based on kate code as referance.

*silence QCommandLineParser runtime messages