Merge branch 'patch/singletagset' into v0.6-a/patched-base

Fix clients with NULL monitor being VISIBLEON

Fix focusnthclient

Fix focusnthclient

Merge branch 'patch/alwaycenter' into v0.6-a/patched-base

Merge branch 'patch/focusnthclient' into v0.6-a/patched-base

Focus nth client

Merge branch 'patch/foreign-toplevel-management' into v0.6-a/patched-base

Fix sticky

Merge branch 'patches/bottomstack' into v0.6-a/patched-base

Merge branch 'patch/namedscratchpads' into v0.6-a/patched-base

Merge branch 'patch/ipc' into v0.6-a/patched-base

Merge branch 'patch/singletagset' into v0.6-a/patched-base

Merge branch 'patch/sticky' into v0.6-a/patched-base

Merge branch 'patch/swallow' into v0.6-a/patched-base

Merge branch 'patch/naturalscrolltrackpad' into v0.6-a/patched-base

Merge branch 'patch/movestack' into v0.6-a/patched-base

Merge branch 'patch/centeredmaster' into v0.6-a/patched-base

feat: access nth monitor

Fix getunusedtag, attachclients

If client is on multiple monitors, it should
be hidden, as the client is visible just on one of
the monitors, and on the other there is empty space instead

Unused tags are only the tags that are not on any
of the monitors.