[xmonad] darcs patch: Add a way to update the modifier in X.L.LayoutModifier

Sat Aug 22 23:39:58 CEST 2009 Daniel Schoepe * Add a way to update the modifier in X.L.LayoutModifier This patch adds the possibility to update the state of a layout modifier when modifying the underlying layout before it is run(i.e. using modifyLayout). The modified state is also passed to the subsequent call of redoLayout, whose return takes precedence if both functions return modified states of the layout modifier.