Remove fixed size for AddContactDialog

src/main/kotlin/org/briarproject/briar/desktop/contact/add/remote/AddContactDialog.kt

@@ -5,7 +5,6 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.material.AlertDialog
 import androidx.compose.material.Button
@@ -124,6 +123,5 @@ fun AddContactDialog(
                 Text("Cancel", color = MaterialTheme.colors.onSurface)
             }
         },
-        modifier = Modifier.size(600.dp, 300.dp),
     )
 }