Improve table

Developer comments

The table should gel in better with the look and feel of the rest. Here are some points: * the width of the table should be initially as wide as all the other pages. Only by clicking on widen, the table should take the complete width. * the height of the table should be no longer than actual lines. After the table it should be grey. * Editing could be replaced by editing by the form, clicking on a specific cell would focus thatn form field. That would get rid of a bunch of problems, but also makes it a bit less comfortable and a step away from the imperfect imitation of behavior of spreadsheet applications.