First round of (proposed) UI changes.
Shift checkboxes to leftmost column
Don't repeat unchanged labels in OTU mapping.
Merge branch 'master' into otu-mapping-simple-and-hungry
Add desired checkbox toggles and behavior.
Enable (and persist) fuzzy-matching checkbox.
Clarify help text for OTU mapping.
More consistent help text.
text fixes
Add buttons to clear selected or all OTU mappings.
De-select OTUs that have left the current view.

This keeps us from taking meaningful action on OTUs that we can't see
in the filtered list.
"Clear mappings" implicitly rejects proposed, too.

In all cases where we offer to "clear mappings", this should also
clobber any proposed mapping for an OTU. Fixes #438.
Merge pull request #463 from OpenTreeOfLife/otu-mapping-simple-and-hungry

Improved OTU mapping (checkboxes on left, global fuzzy toggle)