1.2.2

Fixes

• GTK: sidebar group rows reconcile on a later turn, since removing
  and inserting rows mid-emission faulted inside GTK.
• GTK: the browse popover pops up after the list-row signal that
  opened it finishes emitting, avoiding a fault from grabbing and
  reparenting mid-emission (#14).
• Flatpak: app libraries install under /app/lib so frida-core is
  found — Flatpak's ld searches /app/lib, not /app/lib64 (#11).