Freehand mode fix

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37363 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Use fast click handlers for stylebar

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37364 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4635 Leaf can be inserted after or before a given element

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37365 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
If image loading fails (corrupt file), still load the rest of the file

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37366 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e