Fix program not fitting on low resolution screens

Lowest vertical screen size that I could test and made sure fit is 768 pixels on a field laptop.

Closes #180 (closed)

sohstationviewer/main.py

@@ -70,7 +70,7 @@ def main():
     config.apply_config(wnd)
 
     screen_width, screen_height = app.primaryScreen().size().toTuple()
-    wnd.resize(screen_width, screen_height)
+    wnd.resize(screen_width * (2 / 3), screen_height * (2 / 3))
 
     wnd.show()
     sys.exit(app.exec_())