Formatting::toolTip: inprovements

• optionally show certificate storage location (on this computer vs. on smartcard with no. xyz)
• make KeyID an option like everything else, but default to always on
• fix an empty ugly line problem if Validity was unselected

Fixes kolab/issue4139 (gpg4win)

svn path=/branches/kdepim/enterprise4/kdepim/; revision=1091082