Added new UI files

src/qt/qt_singlekeyseqedit.cpp

@@ -0,0 +1,20 @@
+#include "qt_singlekeyseqedit.hpp"
+
+/*
+	This subclass of QKeySequenceEdit restricts the input to only a single 
+	shortcut instead of an unlimited number with a fixed timeout.
+*/
+
+singleKeySequenceEdit::singleKeySequenceEdit(QWidget *parent) : QKeySequenceEdit(parent) {}
+
+void singleKeySequenceEdit::keyPressEvent(QKeyEvent *event)
+{
+    QKeySequenceEdit::keyPressEvent(event);
+    if (this->keySequence().count() > 0) {
+        QKeySequenceEdit::setKeySequence(this->keySequence());
+        
+		// This could have unintended consequences since it will happen 
+		// every single time the user presses a key.
+        emit editingFinished();
+    }
+}