Inlarge account window to fit with the french translation. Fix #4198.

data/glade/accounts_window.glade

@@ -6,7 +6,7 @@
     <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
     <property name="border_width">12</property>
     <property name="title" translatable="yes">Accounts</property>
-    <property name="default_width">600</property>
+    <property name="default_width">700</property>
     <signal name="destroy" handler="on_accounts_window_destroy"/>
     <child>
       <widget class="GtkVBox" id="vbox1">