Also normalize rect for snarf

Merged literals, changed next icon

Make erase set pixel to 0 when blend is off

Add icon and menu entry to change shapes

The proposed icon looks like this:

    . . . 0 0 0 0 .
    . 0 0 0 . . 0 .
    0 0 0 0 0 . 0 .
    0 0 . 0 0 0 0 .
    0 0 0 0 0 . . .
    . 0 0 0 . . 0 .
    . . . . . 0 0 0
    . . . . . . 0 .

Fixed linting warning

Format

Rework redraw request using a single rectangle region

Using only a rectangle to keep track of tiles that needs to be redrawn
makes rectangle operation faster by removing the iteration on the list
of requests (which was done for each pixel).

Remove clear-menu function

Hide menu when dragging with any tools

Clear menu only when it was shown

Fixed cursor offset

Blending should respect pattern

Returned blend

Checkboard patterns

Updated oatterns

Added space for more patterns

Format

Added ctrl+q to quit

More robust mouse2 paste

Paste snarf