Possible keybinding to switch to previous workspace.
Disabled at default.
Remove new keybinding from 69b7a0ad9277f21ad761c84ac1bae5455a2f879e

The key never existed in mateconf so there is no need to convert.
Remove all effects code for a fresh and clean start
Add a simple unminimize effect the same as minimize
Add "effect_pending" flag

Initialized at META_EFFECT_NONE. The management of this should be done by
caller functions to effect functions.
Remove "icky" timestamp pinging on finish_minimize
Fix: the effect "finished" callback needs to be called after the effect ends

Added two fields to BoxAnimationContext to handle finish callback inside
box_animation_timeout function instead of effect_free. Now the finish
function is called after the effect is finished.
Implement animation handling in implement_showing

Functions meta_window_animate_[un]minimize will handle [un]minimization animations.
Maybe this should be done in effects.c file to trigger animations based on context,
compositing, preferences etc.
Bugfix: run finished function if animations are disabled
Bugfix: If the window shown was minimized, grab focus.
Bugfix: Correct was_minimized flag transition
Remove misleading comment in effect_free function

The new behaviour is the animation callback function should run the
finished function once it's done with the animation.