Bidirectional (Double Arrow) Function Not Working as Expected

[roxycintron]

Description
I loaded the "Numbers" fasta and epi files to test bidirectionality in MT Dev (@mossy426-cdc I believe you have these files). When using the bidirectional function in the Link settings, all epi and DUO links display double arrows. However, there are cases in which only a single arrow is expected, as shown in the table below:

Source	Target	Link	Arrow
A3	A5	duo	double
A5	A3	duo	double
A6	A8	epi	double
A8	A6	epi	double
A3	A7	duo	single
A5	A10	duo	single
A10	A4	duo	single
A10	A6	duo	single
A6	A9	epi	single
A8	A9	epi	single

[dacowan404]

Please retest on dev.

Evan fixed a big part of this bug in 2D view; however I noticed one link (A10-A6) was displaying wrong (dual link with double arrow instead dual link with single arrow). Found a bug in file component when adding new links where it would incorrectly assigned some links as bidirectional (in this case it checked is A6 was previously a source and if A10 was previously a source; instead of just checking if link A6-A10 exist).

[roxycintron]

Tested and is working.