Recalculate grid for a slot change.

src/components/media-grid.ts

@@ -1,5 +1,8 @@
 // TODO: Video scanning not select other camera?
 // TODO: Drag from live results in different cameras being shown in timeline in media viewer?
+// TODO: It's possible to get a single entry in the grid, rendered without the
+// grid (correctly), but still with isGrid so the menu button still shows the
+// take it out of grid mode option.
 
 import {
   CSSResultGroup,
@@ -43,6 +46,7 @@ export class FrigateCardMediaGrid extends LitElement {
     if (!this._controller && this._refSlot.value) {
       this._controller = new MediaGridController(this._refSlot.value, {
         selected: this.selected,
+        displayConfig: this.displayConfig,
       });
     }