prevent keyboard from coming up on launch of game config activity;

instead wait until room name is tapped. (I did this in two places
though one might have been enough. On some devices anyway that
AndroidManifest change is needed to close a keyboard if it's open
prior to opening the activity.)

xwords4/android/XWords4/AndroidManifest.xml

@@ -106,6 +106,7 @@
     <activity android:name="GameConfigActivity"
               android:screenOrientation="sensor"
               android:configChanges="keyboardHidden|orientation|screenSize"
+              android:windowSoftInputMode="stateAlwaysHidden"
               >
       <intent-filter>
         <action android:name="android.intent.action.EDIT" />

xwords4/android/XWords4/res/layout/game_config.xml

@@ -131,6 +131,7 @@
                     android:capitalize="none"
                     android:singleLine="true"
                     android:selectAllOnFocus="true"
+                    android:windowSoftInputMode="stateHidden"
                     android:maxLength="31"
                     android:hint="@string/new_room_hint"
                     />