various - fix misspellings

src/private/DragController.cpp

@@ -34,7 +34,7 @@
 using namespace KDDockWidgets;
 
 namespace KDDockWidgets {
-///@brief Custom mouse grabber, for platforms that dont support grabbing the mouse
+///@brief Custom mouse grabber, for platforms that don't support grabbing the mouse
 class FallbackMouseGrabber : public QObject /// clazy:exclude=missing-qobject-macro
 {
 public:

src/private/quick/qml/TitleBarBase.qml

@@ -14,7 +14,7 @@ import QtQuick 2.9
 /**
  * @brief Base component for title bars.
  *
- * You need to derive from it to give it a GUI appearence you desire.
+ * You need to derive from it to give it a GUI appearance you desire.
  * See TitleBar.qml for an example.
  * Basically you should:
  *  - Show the title

tests/utils.h

@@ -164,7 +164,7 @@ private:
 class QPushButton : public MyWidget
 {
 public:
-    // use const char* to silence QtCreator static analizer warnings when using const char * in tst_docks.cpp
+    // use const char* to silence QtCreator static analyzer warnings when using const char * in tst_docks.cpp
     // We don't have QT_NO_CAST_FROM_ASCII and still it complains, so use an indirection so I can read tst_docks while
     // porting to QtQuick without noise. Once the port is done feel free to change to QString.
     explicit QPushButton(const char *name)