Decreased the Height of unknown connections.
Removed sections as headings, but kept available connections section as
a separator. Now positioned below active/deactivating (instead of only
connected) connections from the rest.
Readjust details expand/minimize area and highlight to the main row.
Set custom margins for ListItem's background.
Removed info row for unknown connections.
Moved security type in details.
Added line between buttons and search field.
Reworked some layouts.
Depends on D27392