Upgrade QScintilla to 2.6

[Owen Arnold]

For windows we know that this upgrade gives us slightly better intellisense, particularly with using Return to select intellisense commands.

This issue was raised after #4444, which aims for full intellisense support on the windows platforms.

[Owen Arnold]

The initial binaries were created as follows

• Download QScintilla 2.6 for Windows (source zip) and unzip
• Copy the directory mkspecs from a full qt source version (I used 4.2.1) and put it in the Third_party/libs/Win64 directory
• Delete the existing Third_Party\include\Qt-4.7.2\include\Qsci directory and copy the one from the source files of QScintilla there instead
• Using the vs 64bit command prompt navigate to Qt4 directory of the downloaded Qscintilla
• In the command prompt run (path to lib/Win64/)qmake.exe qscintilla.pro
• Then run command nmake
• Then copy the dll and .lib for qscintilla2 out of the ./release directory and into the Win66/lib directory

[Owen Arnold]

Ignore attachment, should have gone on another ticket!

[Owen Arnold]

Martyn has copied a patch into our third party source code to cover this.

[Andrei Savici]

Works with Ubuntu 12.04. Seems like version2.6 libraries and headers are in the 3rdparties folders.

[Stuart Campbell]

This ticket has been transferred to github issue ​5303