#89 => Back and next buttons color

...pp/admin/instance/components/instance-form.component.html

.../app/admin/instance/components/instance-form.component.ts

client/src/app/instance/instance.component.spec.ts

client/src/app/instance/instance.component.ts

...h/components/criteria/search-criteria-list.component.html

...h/components/criteria/search-criteria-list.component.scss

...tance/search/components/output/output-info.component.html

...tance/search/components/output/output-info.component.scss

...instance/search/components/progress-bar.component.spec.ts

...rc/app/instance/search/containers/criteria.component.html

...src/app/instance/search/containers/dataset.component.html

.../src/app/instance/search/containers/output.component.html

.../src/app/instance/search/containers/result.component.html

...pp/instance/store/effects/search-multiple.effects.spec.ts

client/src/app/metamodel/models/instance.model.ts

client/src/test-data.ts

conf-dev/create-db.sh

server/doctrine-proxy/__CG__AppEntityInstance.php

server/src/Action/InstanceAction.php

server/src/Action/InstanceListAction.php