- replaced remaining code relying on having the data displayed in a DataView


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code/trunk/gwyddion@16680 25697fe4-d644-49b8-9d30-be5465f2adf3
- fixed a leaking GString


git-svn-id: svn://svn.code.sf.net/p/gwyddion/code/trunk/gwyddion@16681 25697fe4-d644-49b8-9d30-be5465f2adf3