Fixed incorrectly showing close buttons on tabs after restoring session.

Only reproducible when tabs overflows the tabbar.
Also fixed build warning on Windows.

src/lib/lib.pro

@@ -467,7 +467,6 @@ isEqual(QT_MAJOR_VERSION, 5) {
 win32 {
     HEADERS += other/registerqappassociation.h
     SOURCES += other/registerqappassociation.cpp
-    RESOURCES += data/certs.qrc
 }
 
 mac {

src/lib/webview/tabbar.cpp

@@ -55,7 +55,7 @@ TabBar::TabBar(QupZilla* mainClass, TabWidget* tabWidget)
     setElideMode(Qt::ElideRight);
     setDocumentMode(true);
     setFocusPolicy(Qt::NoFocus);
-    setTabsClosable(true);
+    //setTabsClosable(true);
     setMouseTracking(true);
     setMovable(true);