Bug 910188 - [CONTACTS] In export contacts option, if we tap on 'x' button, we come back to Settings screen.
Merge pull request #12269 from gtorodelvalle/dialer-bug-910188-closing-contact-list

Dialer bug 910188 closing contact list (r=jmcanterafonseca)
Bug 916100 - [Contacts] Taapping on the disabled merge button when there are not contacts selected to be merged make it to change its colour.
Bug 910170 - [CONTACTS] The export button isn't disabled when no contact is selected.
Merge pull request #12295 from gtorodelvalle/contacts-bug-916100-footer-button-not-disabled

Bug 916100 - [Contacts] Taapping on the disabled merge button when there are not contacts selected to be merged make it to change its colour (r=jmcanterafonseca)
Merge pull request #12296 from gtorodelvalle/contacts-bug-910170-export-button-not-disabled

Bug 910170 - [CONTACTS] The export button isn't disabled when no contact is selected (r=jmcanterafonseca).