styling of toolbar

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27845 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
create own method for checking if a slider should be moved or if it's value should be changed (necessary because of different behavior in Touch)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27846 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
wrong icon for Segment in Construction Protocol

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27848 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e