Issue #130: Fixed support for indenting by tab
Allow indent a block of code by selecting a range of lines
and pressing 'tab'. The behavior implemented is the same as
the one in Sublime Text editor since I found it intuitive enough.
#define CheckOn14_width 14
#define CheckOn14_height 14
static unsigned char CheckOn14_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x1c, 0x00, 0x1e,
0x0c, 0x0f, 0x9c, 0x07, 0xfc, 0x03, 0xf8, 0x01, 0xf0, 0x00, 0x60, 0x00,
0x00, 0x00, 0x00, 0x00};