Fixed SearchBar layout and icons

This is almost a rewrite of the Search function on the WebView
the old code had a few uneeded things, mostly being a subclass
of QMainWindow instead of the QWebView - this makes the code
use a tiny bit less ram.

The SearchBox was also moved to an own class ( we can use it
later to filter the contents of the DiveList for instance )

and a forced use of the pixmaps for the Mac and Windows platform
was added.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/mainwindow.h

@@ -29,6 +29,7 @@ class ProfileGraphicsView;
 class QWebView;
 class QSettings;
 class UpdateManager;
+class UserManual;
 
 enum MainWindowTitleFormat {
 	MWTF_DEFAULT,
@@ -163,7 +164,7 @@ private:
 	Ui::MainWindow ui;
 	QAction *actionNextDive;
 	QAction *actionPreviousDive;
-	QMainWindow *helpView;
+	UserManual *helpView;
 	QTreeView *yearlyStats;
 	QAbstractItemModel *yearlyStatsModel;
 	CurrentState state;