Fix width of mode selector

Task-number: QTCREATORBUG-9509

Change-Id: Ifec0b6ca777e3e9ed351db7d413339cedcdaecce
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/coreplugin/fancytabwidget.h

@@ -101,11 +101,13 @@ public:
         tab->icon = icon;
         tab->text = label;
         m_tabs.insert(index, tab);
+        updateGeometry();
     }
     void setEnabled(int index, bool enabled);
     void removeTab(int index) {
         FancyTab *tab = m_tabs.takeAt(index);
         delete tab;
+        updateGeometry();
     }
     void setCurrentIndex(int index);
     int currentIndex() const { return m_currentIndex; }