WstImportDlg: fix opening generated files in editor (Thanks Juha Maninnen)

git-svn-id: http://svn.code.sf.net/p/lazarus-ccr/svn@3181 8e941d3f-bd1b-0410-a28a-d453659cc2b4
WstImportDlg: improve GUI layout use anchors (Thanks Juha Maninnen)

git-svn-id: http://svn.code.sf.net/p/lazarus-ccr/svn@3182 8e941d3f-bd1b-0410-a28a-d453659cc2b4