fix: when changing itemsPerPage, also reset page to 0

consider this case:
- there are 11 items
- itemsPerPage is 10
- so there are 2 pages
- you go to page 2
- you change itemsPerPage to 100
- now there's just 1 page, to be precise: 11 items on the first page
- the 2nd page shows nothing

before this commit if the above situation happened, you'd just get a "no
results" page - i think it's safer to redirect to page 0 when changing
itemsPerPage to avoid the case described above

Author: sethidden

packages/theme/composables/useUiHelpers/index.ts

@@ -137,6 +137,7 @@ export function useUiHelpers(): UseUiHelpersInterface {
     const query = {
       ...getFiltersDataFromUrl(false),
       itemsPerPage: itemsPerPage.toString(10),
+      page: '0',
     };
 
     if (forcePush) {