Add high dpi images for the ribbon to use: specifying these should help with startup time in high-dpi mode since the images don't have to be resized by MFC

Based on TortoiseSVN revision 24281, 24288

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Block indentation with tab

Based on TortoiseSVN revision 24286

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
ResText: Use iswspace for wide strings instead of isspace

Based on TortoiseSVN revision 24287

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
TortoiseMerge: Don't initialize the context menu manager: we don't use that

Based on TortoiseSVN revision 24291

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>