use cache to improve loading speed of components

[dfguerrerom]

I've already done a super simple implementation of using cache on f7eda5a, instead of always instantiate view elements, we can store and only change them if there's a change, with this implementation, the performance of the component in terms of speed has increased up to 90%.

I think we can scale up this solution to instead of store the current elements in the object itself, we can save them into a serialized file, and not only increase the time of the component during the session but for all of them.

[12rambau]

I see your point and that's a great idea. So you would like to apply ot every widget reloading istself ? (dropdowns, lists, etc...)

[dfguerrerom]

this cannot be done in other components...