Move to Bootstrap 4

Bootstrap < 4.1.2 has the following CVE:
https://nvd.nist.gov/vuln/detail/CVE-2018-14041

Removed bootstrap-theme.css due to "Replaced the separate optional
theme with configurable options via SCSS variables
(e.g., $enable-gradients: true)."

Added "width: 100%" to a few places where width 100% was no longer
getting inherited.
Moved a few elements and adjusted styles to get the same look as
before.

See https://getbootstrap.com/docs/4.0/migration/ for more
information.

Tested: Manually on a Witherspoon.
Change-Id: I0a72665ac1ca6eacd0b553a585b1fb15e14ae62c
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/server-health/styles/inventory.scss b/app/server-health/styles/inventory.scss
index 42de893..cf6f2b4 100644
--- a/app/server-health/styles/inventory.scss
+++ b/app/server-health/styles/inventory.scss
@@ -23,6 +23,7 @@
     text-decoration: none;
     border-left: 1px solid $medgrey;
     border-right: 1px solid $medgrey;
+    width: 100%;
     border-bottom: 0;
     vertical-align: middle;
     @include fastTransition-all;