WICKET-2478 correction are break

By increasing the array before checking with 1 the code will work when user add only one tab to component...
The applied solution break the correction made for the issue WICKET-2478
I propose:
++ if (tabsVisibilityCache == null || tabsVisibilityCache.length != tabs.size())

{ tabsVisibilityCache = new Boolean[tabs.size()]; }

– if (tabsVisibilityCache.length < tabIndex + 1)
–

{ -- Boolean[] resized = new Boolean[tabIndex + 1]; -- System.arraycopy(tabsVisibilityCache, 0, resized, 0, tabsVisibilityCache.length); -- tabsVisibilityCache = resized; -- }