Allow freeze modified value

[rentalhost]

It should be considered only after #394 be implemented.

On left-side of a data we should have a checkbox that, when enabled, force the value never being updated. So any this.property = newValue just will be ignored. It should be very useful for debug.

[Akryum]

I don't really get what is the use-case for this.

[rentalhost]

Constantly the component will try modify a value. So if we have the ability to change this value (via #394 and #74), should be great if we too could freeze it to test some states that could be faster than us. For instance, I use some data values for some animations, and in some values in the step, it glitch, but is very hard to test it without freeze a exact value.