Before this commit there were two regexes for matching http(s) URLs,
being the only difference between them the presence of a capturing group
for the protocol/scheme. The need for a nearly duplicated version of the
same regex was its use in `_onPaste` as delimiter for String.split(), in
which capturing groups are returned in the resulting array, and the
protocol/scheme was not desired.
This commmit removes the need for two different regexes to match http(s)
URLs, adapting `_onPaste`'s code to work with the presence of the
referred capturing group.
task-3520513
closesodoo/odoo#136497
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>