pgAdmin 4 commit: Update alertify alerts to use the styling definedin

Update alertify alerts to use the styling defined in the styleguide (missed some files in the original commit).

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=f2d2075d81718ec02550fb592851aa330d327b24
Author: Joao Pedro De Almeida Pereira <jdealmeidapereira@pivotal.io>

Modified Files
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web/pgadmin/static/js/alerts/alertify_wrapper.js   |  40 +++++
web/pgadmin/static/scss/_alert.scss                | 119 +++++++++++++++
web/pgadmin/static/scss/_alertify.overrides.scss   | 166 +++++++++++++++++++++
web/pgadmin/static/scss/_othercolors.scss          | 156 +++++++++++++++++++
web/pgadmin/static/scss/_typography.scss           |  68 +++++++++
.../javascript/alerts/alertify_wrapper_spec.js     |  41 +++++
6 files changed, 590 insertions(+)