Reduce memory usage and improve performance.

[yoseph-phillips]

Reduce memory usage and improve performance.

Most important enhancement is in setDependentElements()
If A is dependent on B and B is dependent on C then A does not need to be dependent on C.

moveDependantElements()
Moves common calculations out of the loop and removes the nested call to moveDependantElements()

Breaks early in the prepareElements() loop if no further work is required.

[lalo-mx]

Consider keeping the previous formatting style, more easy to review

[yoseph-phillips]

Consider keeping the previous formatting style, more easy to review

Formatting was the same except that my IDE had replaced tabs with spaces.
I have made it replace the spaces with tabs again so that people don't need to click on ignore whitespace in GitHub when reviewing.