pgAdmin III commit: Fix lots of bugs in foreign table support

Fix lots of bugs in foreign table support

The load of existing foreign tables didn't work well. The contents of
ftoptions in pg_foreign_table strangely isn't compatible with the CREATE
FOREIGN TABLE syntax, so I had to add a function to parse the contents of this
field.

Contents of the types widgets weren't set to blank once a type was added.

And the use of the edit grid window started with a big crash: segmentation
fault.

Per a report from Thom Brown.

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=pgadmin3.git;a=commitdiff;h=dee63a2176031dd451c7f58f70d36ae052c9ea6b

Modified Files
--------------
pgadmin/dlg/dlgForeignTable.cpp         |   46 +++++++--------
pgadmin/frm/frmEditGrid.cpp             |    8 +++
pgadmin/include/schema/pgForeignTable.h |   10 ++-
pgadmin/include/utils/misc.h            |    1 +
pgadmin/schema/pgForeignTable.cpp       |   92 +++++++++++++++++++++++++++++-
5 files changed, 125 insertions(+), 32 deletions(-)