disableSelection should be avoided.

[martinviolet88]

The use of disableSelection should be avoided, when using inline editting(https://github.com/symbiote/silverstripe-gridfieldextensions) the function prevents selecting text and textareafields.
https://api.jqueryui.com/disableselection/

"
Caveat emptor: .disableSelection() is actually harmful on some browsers, as it prevents clicking active elements (e.g. textareas) inside the sortable.

Firefox 33.1 for Mac OS X (Yosemite): .disableSelection() prevents clicking on embedded textarea; doesn't seem to have any effect otherwise (i.e. it is still impossible to select text with the mouse in the sortable if omitted)
Chrome 39.0.2171.71 (64-bit) for Mac OS X: .disableSelection() seems to have no effect whatsoever.
"

[UndefinedOffset]

This can be turned off by setting the 2nd parameter to new GridFieldSortableRows() to false. That said I'll add this to the list to default it to false in a future release.

[martinviolet88]

Thanks for the response.