action: keep array of default actions, instead of list of changes

action: keep array of default actions, instead of list of changes

The implementation of changing the default properties of actions, e.g. a
statements such as (from test/data/compat/basic):
    setMods.clearLocks= True;
    latchMods.clearLocks= True;
    latchMods.latchToLock= True;
works by keeping a list of ActionInfo's, each containing the neccesary
info from each statement, and then when some action comes up (e.g. in an
interpret statment) it goes through the list, and applies the relevent
ActionInfo's to the newly-constructed xkb_action.

Instead of doing this, we add a struct ActionsInfo, which contains an
array of xkb_actions, one for each type. When a default changing
statement appears, we change the action in the array; when a new action
comes up, we just copy from the array. This is simpler to figure out,
and pretty straightforward.

Signed-off-by: Ran Benita <ran234@gmail.com>