Add number of observations for an Object

[johngribbin]

On the Object view, it would be nice if the information in the header also included the total number of observations, and not just the number of observers. As it stands, a user has to open the history table and count the number of observations manually. This is not too hard for newer objects (or those harder to spot) with limited observations, but it is very difficult for those older objects with many observations.

This addition would help users to more quickly understand the trustworthy of the TLEs.

For example- an object that has only been seen by one observer, but over 100 times in last three months... should give a second observer more confidence in the TLE than if the same object only seen once in last three months by one observer.