ui: turn off spell-checking the pasted sequence in browsers that support it
ui: turn off spell-checking the pasted sequence in browsers that support it

Of course the pasted sequence is not a valid dictionary entry; underlining it
in red is not only pointless but also ugly.

Signed-off-by: Anurag Priyam <6e6ab5ea9cb59fe7c35d2a1fc74443577eb60635@gmail.com>

yeban/sequenceserver,aldermossy/sequenceserver,elsiklab/sequenceserver,elsiklab/sequenceserver,vivekiitkgp/sequenceserver,yeban/sequenceserver,jasminZ/sequenceserver,elsiklab/sequenceserver,aldermossy/sequenceserver,jasminZ/sequenceserver,deepakunni3/sequenceserver,yeban/sequenceserver,lepbase/lepbase-sequenceserver,aldermossy/sequenceserver,deepakunni3/sequenceserver,jasminZ/sequenceserver,IsmailM/sequenceserver,IsmailM/sequenceserver,vivekiitkgp/sequenceserver,vivekiitkgp/sequenceserver,yeban/sequenceserver,IsmailM/sequenceserver,lepbase/lepbase-sequenceserver,aldermossy/sequenceserver,lepbase/lepbase-sequenceserver,deepakunni3/sequenceserver