Fix spelling and typos

3rdparty/singleapplication/singleapplication.cpp

@@ -234,7 +234,7 @@ QString SingleApplication::currentUser() {
  * Sends message to the Primary Instance.
  * @param message The message to send.
  * @param timeout the maximum timeout in milliseconds for blocking functions.
- * @return true if the message was sent successfuly, false otherwise.
+ * @return true if the message was sent successfully, false otherwise.
  */
 bool SingleApplication::sendMessage(const QByteArray &message, const int timeout) {
 

3rdparty/singleapplication/singleapplication.h

@@ -42,7 +42,7 @@
 class SingleApplicationPrivate;
 
 /**
- * @brief The SingleApplication class handles multipe instances of the same Application
+ * @brief The SingleApplication class handles multiple instances of the same Application
  * @see QApplication
  */
 class SingleApplication : public QApplication {  // clazy:exclude=ctor-missing-parent-argument

3rdparty/singleapplication/singlecoreapplication.cpp

@@ -234,7 +234,7 @@ QString SingleCoreApplication::currentUser() {
  * Sends message to the Primary Instance.
  * @param message The message to send.
  * @param timeout the maximum timeout in milliseconds for blocking functions.
- * @return true if the message was sent successfuly, false otherwise.
+ * @return true if the message was sent successfully, false otherwise.
  */
 bool SingleCoreApplication::sendMessage(const QByteArray &message, const int timeout) {
 

3rdparty/singleapplication/singlecoreapplication.h

@@ -42,7 +42,7 @@
 class SingleCoreApplicationPrivate;
 
 /**
- * @brief The SingleCoreApplication class handles multipe instances of the same Application
+ * @brief The SingleCoreApplication class handles multiple instances of the same Application
  * @see QCoreApplication
  */
 class SingleCoreApplication : public QCoreApplication {