Keep drop-down suggestion when marker name is fully spelled out

[Michael-Geuenich]

Manually added markers are suggested using a dropdown menu:

However, when the full name is typed the drop-down disappears which makes me think the gene is not in the database.

This is an even bigger issue when there is partial overlap in gene names: e.g. IL3 and IL32. When typing IL3 all other suggestions disappear:

[matt-sd-watson]

possibly related to this: daqana/dqshiny#26

[matt-sd-watson]

update: in the current release, these dropdown menus have been replaced with the standard selectizeInput options from shiny. The speed is slightly slower than the dqshiny autocomplete_input option, but the ability to consistently get the proper results when typing a gene name is preferred.