refactor(grid): grid Config height to be optional to not break possible usages of this interfaces

Author: llorenspujol

package-lock.json

@@ -19,7 +19,7 @@ export type KtdGridCompactType = CompactType;
 export interface KtdGridCfg {
     cols: number;
     rowHeight: number | 'fit'; // row height in pixels
-    height: number | null;
+    height?: number | null;
     layout: KtdGridLayoutItem[];
     preventCollision: boolean;
     gap: number;