Keyboard integration for Streamlink quality confirmation (#3169)

Co-authored-by: zneix <zneix@zneix.eu>

src/widgets/BasePopup.hpp

@@ -3,6 +3,8 @@
 #include "common/FlagsEnum.hpp"
 #include "widgets/BaseWindow.hpp"
 
+class QDialogButtonBox;
+
 namespace chatterino {
 
 class BasePopup : public BaseWindow
@@ -13,6 +15,12 @@ public:
 
 protected:
     void keyPressEvent(QKeyEvent *e) override;
+
+    // handleEscape is a helper function for clicking the "Reject" role button of a button box when the Escape button is pressed
+    bool handleEscape(QKeyEvent *e, QDialogButtonBox *buttonBox);
+
+    // handleEnter is a helper function for clicking the "Accept" role button of a button box when Return or Enter is pressed
+    bool handleEnter(QKeyEvent *e, QDialogButtonBox *buttonBox);
 };
 
 }  // namespace chatterino