widget: Simplify drawing code by translating the cairo context by the padding
widget: Simplify drawing code by translating the cairo context by the padding

Instead of adding the padding everywhere, just translate the cairo context,
once.

saitoha/vte-sixel,thestinger/vte-ng,saitoha/vte-sixel,saitoha/vte-sixel,thestinger/vte-ng,thestinger/vte-ng