Back to results button in cris layout

[floriangantner]

Is your feature request related to a problem? Please describe.
fixes/solves #33
Describe the solution you'd like
Port the Back to results-button introduced in Dspace 7.5 (DSpace#1995 ) to the cris layout. The button is currently not used in the cris matrix layout.

Describe alternatives or workarounds you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
we've opened some PR. We suggest to include the button in the cris-layout.componoth beneath the breadcrumbs so both vertical and horizontal and other own defined Layouts support the functionality

Screenshots (ignore theme-specific modifications visible):
horizontal layout:

vertical layout: