improve ultrasound plot clients

- make plot window not to raise to the front on replot
- chmod +x

bin/us-plot

@@ -1,8 +1,13 @@
 #!/usr/bin/env python3
 import sys
+from pathlib import Path
+# Add import path for inplace usage
+sys.path.insert(0, str(Path(__file__).absolute().parents[1]))
+
 from frappy.client.interactive import Client
 import numpy as np
 import matplotlib.pyplot as plt
+from frappy.iqplot import Pause
 
 Client('pc13252:5000')
 
@@ -40,7 +45,7 @@ else:
             npoints = float(sys.argv[3])
 
     fig, ax = plt.subplots(figsize=(15,3))
-    fig.canvas.mpl_connect('close_event', on_close)
+    pause = Pause(fig)
     try:
         get_signal = iq.get_signal
         print('plotting RUS signal')
@@ -52,8 +57,7 @@ else:
 
     lines = [plot(s, ax, '-', xs) for s in signal]
 
-    while True:
-        plt.pause(0.5)
+    while pause(0.5):
         plt.draw()
         xs, signal = get_signal(start, end, npoints)
         for line, sig in zip(lines, signal):