gui: rm password text box when adding new device

- fast-servo uses ssh public key auth instead of password

README.md

@@ -26,5 +26,5 @@
 | Set the linien-server service to start at bootup     | `linien-server enable`                  |
 | Set the linien-server service not to start at bootup | `linien-server disable`                 |
 
-4. In the dev shell, run `linien` to launch the GUI. Add new device. Username is `root` and it does not take any password to log in. You leave the password field with any text.
+4. In the dev shell, run `linien` to launch the GUI. Add new device. Username is `root`.
 5. Select the newly added device and click connect in the GUI to connect and start the GUI.

fast-servo/linien-gui-hide-password-box.patch

@@ -0,0 +1,14 @@
+diff --git a/linien-gui/linien_gui/ui/new_device_dialog.ui b/linien-gui/linien_gui/ui/new_device_dialog.ui
+index 7d5790c..38c3513 100644
+--- a/linien-gui/linien_gui/ui/new_device_dialog.ui
++++ b/linien-gui/linien_gui/ui/new_device_dialog.ui
+@@ -136,6 +136,9 @@
+                 <property name="text">
+                  <string>root</string>
+                 </property>
++                <property name="visible">
++                    <bool>false</bool>
++                </property>
+                </widget>
+               </item>
+              </layout>

flake.nix

@@ -33,6 +33,7 @@
             ./fast-servo/linien-gui-fast-servo-hardware-specific.patch
             ./fast-servo/linien-gui-add-afe_gain-combo-boxes.patch
             ./fast-servo/linien-gui-do-not-use-opengl.patch
+            ./fast-servo/linien-gui-hide-password-box.patch
             ./fast-servo/linien-client-ssh-port-change.patch
             ./fast-servo/linien-server-fast-servo.patch
             ./fast-servo/linien-server-cli.patch