Use virtio-vga to run VMs

This is the device that has the best empirical performance right now and it
seems like it is where most of the qemu development is directed towards for the
future.

src/virtual/ogOperations.py

@@ -24,7 +24,7 @@ import time
 
 class OgVM:
     DEFAULT_CPU = 'host'
-    DEFAULT_VGA = 'VGA'
+    DEFAULT_VGA = 'virtio-vga'
     DEFAULT_QMP_IP = 'localhost'
     DEFAULT_QMP_PORT = 4444
 
@@ -66,7 +66,7 @@ class OgVM:
         cmd = (f'qemu-system-x86_64 -accel kvm -cpu {self.cpu} -smp 4 '
                f'-drive file={self.partition_path},if=virtio '
                f'-qmp tcp:localhost:4444,server,nowait '
-               f'-device {self.vga},vgamem_mb=128 -display gtk '
+               f'-device {self.vga} -display gtk '
                f'-m {self.mem}M -boot c -full-screen {vnc_str}')
         self.proc = subprocess.Popen([cmd], shell=True)