[jernestmyers]

Previously, the cone search was tied to the main page's Aladin sky map and the table was filtered on the FOV that encompassed the cone search (and some buffer region). Thus, if the Aladin sky map failed to load, then the cone search silently does nothing. These changes give a backup cone search in the event the sky map fails to load. Primarily, the following is done:

1. The vertical space for the map is reduced so that the table is more in-view.
2. A banner is shown with the cone search information and the same link-out that is shown in the sky map (when working properly).
3. Perhaps most importantly, the table is filtered on the actual cone search with appropriate verbiage ("Sources in cone" vs "Sources in view")

Note that the behavior of the SIMBAD search hasn't changed, because the error handling already gives a user feedback.