Refactor to remove "Async" function name suffix

Remove convention where Async suffix is added to functions that returns
a Promise. It was a habit from C#, but is not widely used in JavaScript
/ TypeScript world, also bloats the code. The code is more consistent
with third party dependencies/frameworks without the suffix.

src/presentation/components/TheSearchBar.vue

@@ -26,8 +26,8 @@ export default class TheSearchBar extends StatefulVue {
   public searchQuery = '';
 
   @Watch('searchQuery')
-  public async updateFilterAsync(newFilter: |string) {
-    const context = await this.getCurrentContextAsync();
+  public async updateFilter(newFilter: |string) {
+    const context = await this.getCurrentContext();
     const filter = context.state.filter;
     if (!newFilter) {
       filter.removeFilter();