fetch all possible units and assign to filter units select when loading comp pharma
rest the filters after selecting an activity to filter on
all the possible units normalised by the api are available for filtering not just those relevant to the selected activity type
target pharma filters
target and assay organism filter
link to targets from comp pharma via button and action since we do not know the CW URI
link to external target resource from comp pharma
css based spinner when fetching results
add more levels to tree.
remove unneeded widths from names per level in css.
rename tree table headers