ui: winsparkle autoupdate mandatory

suppression of the compiler instructions allowing hiding autoupdate
in configuration widget (options) and mainwindow (connection to the winsparkle-ring.xml).

plus corrected styling and .pro file according to this change

Change-Id: Ib3d2b3d4ceae9101b6aeb2af4c10398dd0c24a3d
diff --git a/stylesheet.css b/stylesheet.css
index 606bd44..38198f8 100644
--- a/stylesheet.css
+++ b/stylesheet.css
@@ -297,7 +297,7 @@
 }
 
 QPushButton#wizardButton:hover, QPushButton#playButton:hover, QPushButton#clearHistoryButton:hover,
-QPushButton#doTransferButton:hover, QPushButton#photoButton:hover,
+QPushButton#checkUpdateButton:hover, QPushButton#doTransferButton:hover, QPushButton#photoButton:hover,
 QPushButton#takePhotoButton:hover, QPushButton#importButton:hover,
 QPushButton#existingPushButton:hover, QPushButton#newAccountButton:hover, QPushButton#previousButton:hover,
 QPushButton#exportButton:hover, QPushButton#cancelAddButton:hover, QPushButton#exportOnRingButton:hover,
@@ -307,7 +307,7 @@
 }
 
 QPushButton#wizardButton:pressed, QPushButton#playButton:pressed, QPushButton#clearHistoryButton:pressed,
-QPushButton#doTransferButton:pressed, QPushButton#photoButton:pressed,
+QPushButton#checkUpdateButton:pressed, QPushButton#doTransferButton:pressed, QPushButton#photoButton:pressed,
 QPushButton#takePhotoButton:pressed, QPushButton#importButton:pressed,
 QPushButton#existingPushButton:pressed, QPushButton#newAccountButton:pressed, QPushButton#previousButton:pressed,
 QPushButton#exportButton:pressed, QPushButton#cancelAddButton:pressed, QPushButton#exportOnRingButton:pressed,