The previous viewmanager (before its refactoring in sept/oct 2014) was
ignoring some promises in its do_load_state method. The refactoring
actually fixed that, but of course, some other code was dependent on
the broken implementation. This commit removes the use of promises in
do_load_state, which is functionally equivalent to the previous code.
As a result, it relies on some subtle timing of the creation and
initialization of various views. It is somewhat fragile, but it is
actually what the former code did, only in a more explicit way.
Géry Debongnie
bfcfc62fbf