Add missing includes + fix convertion QChar (qt6 build)

src/composer-ng/richtextcomposeractions.cpp

@@ -13,6 +13,7 @@
 #include <KFontSizeAction>
 #include <KLocalizedString>
 #include <KToggleAction>
+#include <QActionGroup>
 #include <QTextCharFormat>
 #include <QTextList>
 

src/composer-ng/richtextcomposercontroler.cpp

@@ -21,6 +21,7 @@
 #include <QColorDialog>
 #include <QIcon>
 #include <QPointer>
+#include <QRegExp>
 #include <QTextBlock>
 #include <QTextDocumentFragment>
 #include <QTextList>
@@ -672,7 +673,7 @@ void RichTextComposerControler::RichTextComposerControlerPrivate::fixupTextEditS
 
     // Get rid of embedded images, see QTextImageFormat documentation:
     // "Inline images are represented by an object replacement character (0xFFFC in Unicode) "
-    text.remove(0xFFFC);
+    text.remove(QChar(0xFFFC));
 
     // In plaintext mode, each space is non-breaking.
     text.replace(QChar::Nbsp, QChar::fromLatin1(' '));

src/texteditor/plaintexteditor/plaintexteditor.cpp

@@ -15,6 +15,7 @@
 #include <KSharedConfig>
 #include <KStandardAction>
 #include <KStandardGuiItem>
+#include <QActionGroup>
 #include <QIcon>
 
 #include "texttospeech/texttospeech.h"

src/texteditor/richtexteditor/richtexteditor.cpp

@@ -16,6 +16,7 @@
 #include <KSharedConfig>
 #include <KStandardAction>
 #include <KStandardGuiItem>
+#include <QActionGroup>
 #include <QIcon>
 
 #include <KIO/KUriFilterSearchProviderActions>