Made it so pressing tab in the textbox changes focus

Author: ataylor32

tts.py

@@ -22,6 +22,7 @@ def __init__(self):
 		# Textbox
 		self.textbox = QTextEdit(self)
 		self.textbox.setPlaceholderText("Enter text to speak...")
+		self.textbox.setTabChangesFocus(True)
 		layout.addWidget(self.textbox)
 
 		# Speed Slider Layout