Make text selection an option for all selection modes

[jrlacy]

Looking at the migration wiki and playing around with dgrid for a bit, it seems that text selection is disabled by design when there is a selection mode that lets you select rows in the grid. If possible, I'd like this changed so that text selection is a separate option like it was in the older grid. It's been my experience that the two serve different purposes. I've had users notice when this wasn't enabled in the past. No matter how good the rest of the grid is, they expect to be able to wrangle it like a normal html table, too.

Also, while the docs say that specifying none for the selectionMode enables 'normal' text selection, I couldn't get this to work in IE9 or Chrome.

[cwocwo]

I also have this issue. And here:
http://dojo-toolkit.33424.n3.nabble.com/dgrid-please-don-t-tie-text-selection-to-record-selection-td3934209.html

[ghost]

FYI, the IE9/Chrome problem is due to http://bugs.dojotoolkit.org/ticket/15990 which is fixed in 1.8.2+ and will be fixed in 1.7.5, but dgrid/Selection now has the logic to handle it itself regardless of what version of Dojo you use. It also has a more efficient fallback for IE<10.