Fixed: Series posters flickering when width changes repeatedly

Closes #6311

frontend/src/Store/Selectors/createDimensionsSelector.ts

@@ -1,8 +1,9 @@
 import { createSelector } from 'reselect';
+import AppState from 'App/State/AppState';
 
 function createDimensionsSelector() {
   return createSelector(
-    (state) => state.app.dimensions,
+    (state: AppState) => state.app.dimensions,
     (dimensions) => {
       return dimensions;
     }