* Enforce fixed column number at various width breakpoints. * Bring back the filmstrip at small sizes but hide it. * Change default maximum columns to 7.
* Implement opening toolbar and participant overflows as drawers when below certain width. * Fix dial-in copy button displaying incorrectly.
* ref(Filmstrip): Optimize resizes. * fix(thumbnails): resize. * fix(thumbnails): Issue with height 0, width 0. * doc(Filmstrip): Improve JSDoc.