Some styling for toolbar to check keyevents.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32921 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
This should fix #4187, this time really

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32922 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Hide tooltip, if submenu of toolbar will be opened by Enter or Down arrow key.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32923 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Right/left keys work on toolbar's submenu.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32924 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
First item of toolbar's submenu gets the focus, if the submenu has opened by down arrow key.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32925 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e