Make redo button visible again (if window wide enough)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34548 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Bugfix for button

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34549 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Refactor intersect curve tool

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34550 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
wrong refactor

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34551 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e