SearchOperation create child when exec

Kiwix-iOS/Info.plist

@@ -49,7 +49,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>1.8.361</string>
+	<string>1.8.369</string>
 	<key>ITSAppUsesNonExemptEncryption</key>
 	<false/>
 	<key>LSRequiresIPhoneOS</key>

Kiwix-iOSWidgets/Bookmarks/Info.plist

@@ -21,7 +21,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>1.8.364</string>
+	<string>1.8.372</string>
 	<key>NSExtension</key>
 	<dict>
 		<key>NSExtensionMainStoryboard</key>

Kiwix/Operations/SearchOperation.swift

@@ -10,8 +10,14 @@ import Operations
 
 class SearchOperation: GroupOperation {
     private(set) var results = [SearchResult]()
+    let searchTerm: String
     
     init(searchTerm: String) {
+        self.searchTerm = searchTerm
+        super.init(operations: [])
+    }
+    
+    override func execute() {
         let searches: [BookSearch] = ZimMultiReader.shared.readers.keys.map({ BookSearch(zimID: $0, searchTerm: searchTerm) })
         let sort = Sort()
         searches.forEach { (search) in
@@ -19,12 +25,16 @@ class SearchOperation: GroupOperation {
                 operation.requirement += dependency.results
             })
         }
-        super.init(operations: searches + [sort])
         
         sort.addObserver(DidFinishObserver { [unowned self] (operation, errors) in
             guard let operation = operation as? Sort else {return}
             self.results = operation.requirement
             })
+        
+        addOperations(searches)
+        addOperation(sort)
+        
+        super.execute()
     }
 }