client.py: Suffixes of image files are also allowed to be in upper case

playbook/templates/client.py

@@ -15,7 +15,7 @@ binding_back = [ord('h'), ord('q'), curses.KEY_BACKSPACE]
 binding_exit = [ord('Q')]
 
 def show_pictures(path):
-    files = sorted([str(f) for f in path.iterdir() if f.is_file() and f.suffix in ['.png', '.jpg', '.jpeg', '.gif']])
+    files = sorted([str(f) for f in path.iterdir() if f.is_file() and f.suffix.lower() in ['.png', '.jpg', '.jpeg', '.gif']])
     files.insert(0, '/usr/bin/imvr')
     subprocess.call(files)
     return True