labels plugin: shorter description for kivy gui

gui/kivy/uix/dialogs/checkbox_dialog.py

@@ -11,8 +11,6 @@ Builder.load_string('''
     pos_hint: {'top':0.9}
     BoxLayout:
         orientation: 'vertical'
-        Widget:
-            size_hint: 1, 0.1
         Label:
             id: description
             text: ''
@@ -26,6 +24,8 @@ Builder.load_string('''
                 text: _('Enable')
             CheckBox:
                 id:cb
+        Widget:
+            size_hint: 1, 0.1
         BoxLayout:
             orientation: 'horizontal'
             size_hint: 1, 0.2

plugins/labels/__init__.py

@@ -1,9 +1,9 @@
 from electrum.i18n import _
 
 fullname = _('LabelSync')
-description = '\n'.join([
-    _("Synchronize your labels across multiple Electrum installs by using a remote database to save your data. Labels, transactions ids and addresses are encrypted before they are sent to the remote server."),
-    _("The label sync's server software is open-source as well and can be found on github.com/maran/electrum-sync-server")
+description = ' '.join([
+    _("Save your wallet labels on a remote server, and synchronize them across multiple devices where you use Electrum."),
+    _("Labels, transactions IDs and addresses are encrypted before they are sent to the remote server.")
 ])
 available_for = ['qt', 'kivy']