details: Only show channel state for qemu ga channel

This is the only one that we get notified when the XML changes,
so it's the only one we can be certain is up to date. Users have
gotten confused about out of date spice info here:

https://bugzilla.redhat.com/show_bug.cgi?id=2027867

Signed-off-by: Cole Robinson <crobinso@redhat.com>

virtManager/details/details.py

@@ -2097,6 +2097,7 @@ class vmmDetails(vmmGObjectUI):
         dev_type = chardev.type or "pty"
         primary = self.vm.serial_is_console_dup(chardev)
         show_target_type = not (char_type in ["serial", "parallel"])
+        is_qemuga = chardev.target_name == chardev.CHANNEL_NAME_QEMUGA
 
         if char_type == "serial":
             typelabel = _("Serial Device")
@@ -2121,8 +2122,9 @@ class vmmDetails(vmmGObjectUI):
         self.widget("char-type").set_markup(typelabel)
         self.widget("char-dev-type").set_text(dev_type)
 
-        def show_ui(widgetname, val):
-            doshow = bool(val)
+        def show_ui(widgetname, val, doshow=None):
+            if doshow is None:
+                doshow = bool(val)
             uiutil.set_grid_row_visible(self.widget(widgetname), doshow)
             self.widget(widgetname).set_text(val or "-")
 
@@ -2146,7 +2148,10 @@ class vmmDetails(vmmGObjectUI):
         show_ui("char-source-path", chardev.source.path)
         show_ui("char-target-type", target_type)
         show_ui("char-target-name", chardev.target_name)
-        show_ui("char-target-state", chardev.target_state)
+        # Only show for the qemu guest agent, which we get async
+        # notifiations about connection state. For spice this UI field
+        # can get out of date
+        show_ui("char-target-state", chardev.target_state, doshow=is_qemuga)
 
     def _refresh_hostdev_page(self, hostdev):
         rom_bar = hostdev.rom_bar