Resizing the window while viewing a nomad page causes extreme lag

If you attempt to resize the window while the nomadnet browser is displaying a page, it locks up the entire window manager and hangs for a while before it recovers (or crashes).

**Platform:** Windows 11 23H2 22631.6199
**Versions:** MeshChat v2.3.0 • RNS v1.0.2 • LXMF v0.9.2 • Python v3.11.9