This prevent to load the translation gadget during the page load

Do not prevent different gadget to be loaded in parallel

Reduce number of acquire method call

Stop displaying the loader everytime jIO is called.
This clarify the loader meaning: the page is rendering.

Stop displaying the header loader during the first rendering.

Panel is already closed during bootstrap

This slow down the current rendering, but the goal is to delay their usage.

This was only used with jquery mobile.

If ERP5 hateoas calculation is fast, try not to wait for the warmup to be finished (especially if those gadgets are not used).

Warmup the panel, header, translation gadgets

This improve the feeling of speed when refreshing.

It defaults to MAX_PARTITIONS, but if needed allows the caller to change the
amount of runs, especially in case if fine grained expectations are needed
from instantiation.

/reviewed-on !805