replaced subprocess.run with Popen to not block GUI; load pipeline list on every _get_roi call

scam.py

@@ -43,7 +43,7 @@ from settings import SettingsList
 
 pc = PipelineClient("http://sf-daqsync-01:8889")
 si = pc.get_server_info()
-pls = all_pls = si["active_instances"]
+pls = si["active_instances"]
 if not clargs.show_all_settings:
     pls = (i for i in pls if "spec_db" in i)
 pls = sorted(pls)
@@ -171,7 +171,7 @@ class MainPanel(wx.Panel):
         cam = self.camera
         cmd = f"screen_panel -persist -cam={cam}"
         print(cmd)
-        subprocess.run(cmd.split())
+        subprocess.Popen(cmd.split(), start_new_session=True)
 
 
     def on_get_roi_bkg(self, event):
@@ -189,7 +189,10 @@ class MainPanel(wx.Panel):
 
     def _get_roi(self):
         cam = self.camera
+        si = pc.get_server_info()
+        all_pls = si["active_instances"]
         cam_pls = [i for i in all_pls if i.startswith(cam)]
+        print(cam_pls)
         suffices = ("sp", "sp1")
         sp_pls = [i for i in cam_pls if i.split("_")[1] in suffices]