[Roles] Add context title to back button

• Type: Story
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: None
• Fix Version/s: None
• Component/s: User Management > Roles
• Labels: None
• Epic Link: Add Context Title to All Back Buttons

The back button is present in the following files:

/roles/roles-admin-web/src/main/resources/META-INF/resources/edit_role_assignments.jsp
/roles/roles-admin-web/src/main/resources/META-INF/resources/edit_role_permissions.jsp
/roles/roles-admin-web/src/main/resources/META-INF/resources/edit_role.jsp