Handle close GlobalSearchModal gracefully

The current close infrastructure modifies a prop which has
 no real effect aside bugs.

In addition, calling the `NcModal.close()` as the primary way to
 close the search modal instead of using the states defined in `GlobalSearch` view
 causing re-open bugs (Modal cannot open, needs to click twice, and other weird stuff).

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>
Signed-off-by: nextcloud-command <nextcloud-command@users.noreply.github.com>

core/src/views/GlobalSearch.vue

@@ -26,7 +26,7 @@
 				<Magnify class="global-search__trigger" :size="22" />
 			</template>
 		</NcButton>
-		<GlobalSearchModal :is-visible="showGlobalSearch" :class="'global-search-modal'" />
+		<GlobalSearchModal :class="'global-search-modal'" :is-visible="showGlobalSearch" @update:isVisible="handleModalVisibilityChange" />
 	</div>
 </template>
 
@@ -54,6 +54,9 @@ export default {
 		toggleGlobalSearch() {
 			this.showGlobalSearch = !this.showGlobalSearch
 		},
+		handleModalVisibilityChange(newVisibilityVal) {
+			this.showGlobalSearch = newVisibilityVal
+		},
 	},
 }
 </script>

core/src/views/GlobalSearchModal.vue

@@ -2,7 +2,7 @@
 	<NcModal id="global-search"
 		ref="globalSearchModal"
 		:name="t('core', 'Global search')"
-		:show.sync="isVisible"
+		:show.sync="internalIsVisible"
 		:clear-view-delay="0"
 		:title="t('Global search')"
 		@close="closeModal">
@@ -201,6 +201,7 @@ export default {
 			contacts: [],
 			debouncedFind: debounce(this.find, 300),
 			showDateRangeModal: false,
+			internalIsVisible: false,
 		}
 	},
 
@@ -225,12 +226,17 @@ export default {
 	},
 	watch: {
 		isVisible(value) {
+			this.internalIsVisible = value
+		},
+		internalIsVisible(value) {
+			this.$emit('update:isVisible', value)
 			this.$nextTick(() => {
 				if (value) {
 					this.focusInput()
 				}
 			})
 		},
+
 	},
 	mounted() {
 		getProviders().then((providers) => {
@@ -516,7 +522,7 @@ export default {
 			this.$refs.searchInput.$el.children[0].children[0].focus()
 		},
 		closeModal() {
-		    this.$refs.globalSearchModal.close()
+			this.internalIsVisible = false
 			this.searchQuery = ''
 		},
 		supportFiltering() {