Different handling in function "Export to logical model"

[mirschel]

The option "Export to logical model" have two different flavors. One is used by the editor where the mdl coordinates but no graphics are exported (call from the central import-export menu in browser). The other option is using the explorer. Here, the coordinates of the explorer-graphics and the graphics are exported (call from the explorer menu). The ordinary user is the explorer way because the user gets nicer networks.

For new users it is hard to find the explorer option because the editor option is more central but in practice less important. Also the differences are not obvious and therefore it could be confusing. Both option should be unified in some way.