properly support escaped backslashes before variables:
properly support escaped backslashes before variables:

\${foo} => escaped, should be inserted as ${foo}
\\${foo} => unescaped, should be inserted as \foo
\\\${foo} => escaped, should be inserted as \${foo}
...

svn path=/trunk/KDE/kdelibs/interfaces/ktexteditor/; revision=1063632

cmacq2/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,hlamer/kate,jfmcarreira/kate,DickJ/kate,sandsmark/kate,hlamer/kate,cmacq2/kate,sandsmark/kate,DickJ/kate,sandsmark/kate,DickJ/kate,jfmcarreira/kate,hlamer/kate,sandsmark/kate,hlamer/kate,cmacq2/kate,hlamer/kate,hlamer/kate,DickJ/kate,hlamer/kate,hlamer/kate