[dw-free] add option to change sticky entry text to all layouts

[afuna]

[commit: http://hg.dwscoalition.org/dw-free/rev/e39e8d9b5d68]

http://bugs.dwscoalition.org/show_bug.cgi?id=1850

Add sticky entry pre-subject text property to Bases, Blanket, Drifting.

Patch by yvi.

Files modified:

• bin/upgrading/s2layers/bases/layout.s2
• bin/upgrading/s2layers/blanket/layout.s2
• bin/upgrading/s2layers/drifting/layout.s2

( Diff: 3 files changed. )