Allow empty password in Connect and Discover dialogs

Some devices have no password configured, so only username is required.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app_state.py

@@ -8,7 +8,7 @@ so later rebinding would only ever be seen by the module that did it.
 import configparser
 import os
 
-VERSION = "0.0.0.100"
+VERSION = "0.0.0.102"
 PROPERTIES_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "editor.properties")
 DEFAULT_GRID_SIZE = 10
 DEFAULT_ADD_TIMESTAMP = True

connect_dialog.py

@@ -96,9 +96,6 @@ class ConnectDialog:
         if not user:
             self._status_label.config(text="Username is required", foreground="#c00000")
             return
-        if not password:
-            self._status_label.config(text="Password is required", foreground="#c00000")
-            return
 
         try:
             port_int = int(port)
@@ -393,9 +390,6 @@ class _CredentialsDialog:
         if not user:
             self._status_label.config(text="Username is required", foreground="#c00000")
             return
-        if not password:
-            self._status_label.config(text="Password is required", foreground="#c00000")
-            return
 
         try:
             port_int = int(self._port)