Fix continue-all in conditional break.

[FiV0]

The :continue-all command was previously not
ignoring conditional breakpoints as in the
following code.

(for [i (range 10)]
#dbg ^{:break/when (even? i)}
(inc i))

Fixes #656.

Before submitting a PR make sure the following things have been done:

• The commits are consistent with our contribution guidelines
• You've added tests to cover your change(s)
• All tests are passing
• The new code is not generating reflection warnings
• You've updated the README (if adding/changing middleware)

[bbatsov]

Thanks for tackling this! The code looks good. Just mention the bugfix in the changelog.