SciDAVis - Improvements SVN-temp

- fixed a crash when removing columns

- fixed control tabs ui file

- merged revs 920 and 921 from trunk
- added a few keyboard shortcuts

- fixed another copy&paste related issue in Table

- fixed paste in Table
- copy&paste in Table and Matrix now always use 16 digits
to avoid data loss

- fixed closing of tables and matrices
- fixed table statistics (required some ugly temporary hacks)
- removed usage of QWidget::name() which is != MyWidget::name() now
and obsolete (qt3support) anyway
- table statistics are now removed when the base table is removed
- fixed some other issues in Table
- removed 2 unneeded files

- fixed a bug that columns in a table had more rows
than the table
- fixed loading from XML for Table, Matrix and Folder
- fixed a crash in Table when columns are removed

- some more Table methods removed or ported

- merged revs 914 and 915 from the trunk

- renamed some methods that had inappropriate names