[fractal/piotrdrag/fix-translatable-true] ui: Fix translatable attribute in login_flow

[Piotr Drąg <piotrdrag src gnome org>]

commit 9f63d0c15553a5d07c864d80da9f855a084e3b0c
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Apr 21 12:58:52 2019 +0200

    ui: Fix translatable attribute in login_flow
    
    It takes “yes,” not “true”.

 fractal-gtk/res/ui/login_flow.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/fractal-gtk/res/ui/login_flow.ui b/fractal-gtk/res/ui/login_flow.ui
index 04e35327..ebaac45a 100644
--- a/fractal-gtk/res/ui/login_flow.ui
+++ b/fractal-gtk/res/ui/login_flow.ui
@@ -44,7 +44,7 @@
           <object class="GtkButton" id="login_button">
             <property name="visible">True</property>
             <property name="use_underline">True</property>
-            <property name="label" translatable="true">_Log In</property>
+            <property name="label" translatable="yes">_Log In</property>
             <property name="action_name">login.server_chooser</property>
             <property name="height-request">48</property>
             <style>