Fix edit screen formatting

See merge request !148

Remove external_id from table view and filters

See merge request !143

Rename "Source" to "Collection Type"

See merge request !142

Merge branch 'sudan_configuration' into 'master'

See merge request !146

Add configuration for DRC and Uganda instances

See merge request !145

This is a bit of quick ad hoc approach still - the fixtures will need
manual loading, and some manual changes in the admin backend (after
loading taxonomoy fixture).

But it feels premature to automate this not knowing more about how many
instances will be supported and what approaches for default setups make
most sense (would we move this to multisite etc).

See Shttps://aptivate.kanbantool.com/b/437721-internews-hid-2018#27567031.

See https://aptivate.kanbantool.com/b/437721-internews-hid-2018#27567021.

Add sub_location to Message

See merge request !138

See https://aptivate.kanbantool.com/b/437721-internews-hid-2018#27566989.

At current state, filtering with the new sub_location field is not
related to the location field on Message because it is not clear what
behaviour should take place. For example, filtering only sub locations
of specific locations or filtering on all sub-locations.

Add sudan instance custom configs

See merge request !141

Sudan configuration

See merge request !140

Add tags column to Kobo configuration

See merge request !139

Keyword search

See merge request !137