Lot of request on user role change

[lmmrssa]

When we change user role it takes a while to reflect that change. It can be experienced on EARTH as there are lot of users from different communities.
Tried to activate one of the user

On background it made lot of request. Then only it reflect the change.

It is fetching whole list and updating the view. So we need to change that to just fetch changes.

[paulbert]

The requests that it makes are here:

this.couchService.findAll(this.dbName, { 'selector': {}, 'limit': 100 }),
this.couchService.findAll('login_activities', { 'selector': {}, 'limit': 100 }),
this.couchService.findAll('child_users', { 'selector': {} }),
this.couchService.findAll('communityregistrationrequests', { 'selector': { 'registrationRequest': 'accepted' } })

The first quick way to reduce the number of requests made would be to remove the 'limit': 100 from the first two functions. This will revert those to the default for findAll which is 1000.

Second, longer term fix is to set these databases up with the StateService which controls storing the data from the databases and running a /_changes request to the database to only fetch new or updated documents after the first findAll.