FastButton (bugfix)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27895 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Make sure dashed lines can be switched off in HTML5

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27896 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] fix again for solve

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27897 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] Detect linear systems in solve -> call linsolve in that case

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27898 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
StandardButton (formally known as StandardImageButton) can now hold icon and/or label.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27899 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e