fix(unified-search): filteredProviders now inherits all provider props

The main providers come from both the backend and client side plugins such as `in-folder` search.
The main providers may carry callbacks functions and other information that should be passed to the `filteredProviders`.
This is important because the current code does not make a distinction between `filteredProviders` and `providers`
rightly so, becuase they are the same thing!

Without the mentioned distinction above, sooner or later, we try to access a property on the `filteredProviders` which we
did not transfer with the manual property copy.

----

This fix prevents in-folder search from searching everywhere when "load more results" is clicked; Essentially ignoring the in-folder
search filter.

Signed-off-by: nfebe <fenn25.fn@gmail.com>

core/src/components/UnifiedSearch/UnifiedSearchModal.vue

@@ -507,6 +507,11 @@ export default defineComponent({
 			// If load more result for filter, remove other filters
 			this.filters = this.filters.filter(filter => filter.id === provider.id)
 			this.filteredProviders = this.filteredProviders.filter(filteredProvider => filteredProvider.id === provider.id)
+			// Plugin filters may have extra parameters, so we need to keep them
+			// See method handlePluginFilter for more details
+			if (this.filteredProviders.length > 0 && this.filteredProviders[0].isPluginFilter) {
+				provider = this.filteredProviders[0]
+			}
 			this.addProviderFilter(provider, true)
 		},
 		addProviderFilter(providerFilter, loadMoreResultsForProvider = false) {
@@ -531,13 +536,8 @@ export default defineComponent({
 				this.filters = this.syncProviderFilters(this.filters, this.filteredProviders)
 			}
 			this.filteredProviders.push({
-				id: providerFilter.id,
-				appId: providerFilter.appId,
-				searchFrom: providerFilter.searchFrom,
-				name: providerFilter.name,
-				icon: providerFilter.icon,
+				...providerFilter,
 				type: providerFilter.type || 'provider',
-				filters: providerFilter.filters,
 				isPluginFilter: providerFilter.isPluginFilter || false,
 			})
 			this.filters = this.syncProviderFilters(this.filters, this.filteredProviders)