Refactor/migrate filmstrip and workspace functions out of dahuapp module.

[barraq]

Some functions in dahuapp main module are not supposed to be there (see below). Those functions must be moved to controllers, views, models.

    // @todo remove this from here
    events.on('app:filmstrip:onScreenSelected', function(screen) {
        onScreenSelect(screen);
    });
    // @todo remove this from here
    events.on('app:workspace:tooltips:new', function() {
        onTooltipAdd();
    });
    // @todo remove this from here
    events.on('app:workspace:tooltips:edit', function(tooltip) {
        onTooltipEdit(tooltip);
    });