#4457 - Web UI for line opacity added. Opacity not saved for default values (255).

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35369 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4457 - Line opacity for BarGraph added

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35370 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
hopefully faster image drawing

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35371 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
goback

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35372 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e