Search - gene symbol HGVS suggested search for symbol

For the gene HGVS search, I added a message:

"Warning: {gene_symbol} has {num_other} other transcripts in {genome_build.name} that may resolve to different coordinates. You may wish to search for the gene symbol to view all results"
I wanted to have an HTML link (so was thinking about marking it safe) but but you can't have that as the whole Search result div is clickable... so I went for the message.

An alternative would be like when you search Google, it comes up with "do you mean.... "

James commented that we already have ```SearchMessage(substituted=True)``` - should just return symbols marked like this and see how it looks