Fix "Async pipe results should not be negated" from lint

Author: tdonohue

src/app/shared/search/search-filters/search-filter/search-authority-filter/search-authority-filter.component.html

@@ -26,6 +26,6 @@
                           (submitSuggestion)="onSubmit($event)"
                           (clickSuggestion)="onClick($event)"
                           (findSuggestions)="findSuggestions($event)"
-                          *ngIf="!(isAvailableForShowSearchText | async)"
+                          *ngIf="(isAvailableForShowSearchText | async) === false"
                           ngDefaultControl></ds-filter-input-suggestions>
 </div>

src/app/shared/search/search-filters/search-filter/search-hierarchy-filter/search-hierarchy-filter.component.html

@@ -26,7 +26,7 @@
                           (submitSuggestion)="onSubmit($event)"
                           (clickSuggestion)="onClick($event)"
                           (findSuggestions)="findSuggestions($event)"
-                          *ngIf="!(isAvailableForShowSearchText | async)"
+                          *ngIf="(isAvailableForShowSearchText | async) === false"
                           ngDefaultControl
     ></ds-filter-input-suggestions>
 </div>

src/app/shared/search/search-filters/search-filter/search-text-filter/search-text-filter.component.html

@@ -26,6 +26,6 @@
                           (submitSuggestion)="onSubmit($event)"
                           (clickSuggestion)="onClick($event)"
                           (findSuggestions)="findSuggestions($event)"
-                          *ngIf="!(isAvailableForShowSearchText | async)"
+                          *ngIf="(isAvailableForShowSearchText | async) === false"
                           ngDefaultControl></ds-filter-input-suggestions>
 </div>