indicate stop codon in sequence when CDS is being color for phase

[nathandunn]

in draggable HTMLFeatures, indicate stop codon in phase with an orange or yellow line (or asterisk) if in phase stop codon present.

Note: #1852 , https://github.com/GMOD/Apollo3Server/issues/76 , and https://github.com/GMOD/Apollo3Server/issues/75

[nathandunn]

setting longest ORF does set and fix to the approiate ending CDS

[nathandunn]

This is slightly problematic in that the CDS (and frame) is drawn in DraggableHTMLFeatures using retrieved exon and cds boundaries.

The sequence is stored in the sequencetrack.

Getting the frame out and redrawing in another is going to be a mess at this point. Moving to JB2 code-base.