Workaround for bug on wxWidgets 2.9.0 Ubuntu 9.10 64-bit where first character...

Workaround for bug on wxWidgets 2.9.0 Ubuntu 9.10 64-bit where first character of the hidden columns were displayed so status column had three numbers overprinted.  Fixed by adding a leading space to the hidden columns.  64-bit compile with wxWidgets 2.9.0 seems to be fully working normally now.

git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@62 1a98c847-1fd6-4fd8-948a-caf3550aa51b