Fix window blocking during a call

src/manjaro_hello.py

@@ -250,7 +250,7 @@ class ManjaroHello():
         """Event for differents actions."""
         name = action.get_name()
         if name == "install":
-            subprocess.call(["sudo", "-E", "calamares"])
+            subprocess.Popen(["sudo", "-E", "calamares"])
         elif name == "autostart":
             autostart = True if action.get_active() else False
             self.set_autostart(autostart)

ui/manjaro-hello.glade

@@ -5,7 +5,6 @@
   <object class="GtkAboutDialog" id="aboutdialog">
     <property name="can_focus">False</property>
     <property name="title" translatable="yes">About</property>
-    <property name="modal">True</property>
     <property name="type_hint">dialog</property>
     <property name="program_name">Manjaro Hello</property>
     <property name="version">0.3.1</property>