Do not reset filter when staying on the same board

Signed-off-by: Julius Härtl <jus@bitgrid.net>

src/components/Controls.vue

@@ -259,8 +259,10 @@ export default {
 		},
 	},
 	watch: {
-		board() {
+		board(current, previous) {
-			this.clearFilter()
+			if (current?.id !== previous?.id) {
+				this.clearFilter()
+			}
 		},
 	},
 	methods: {