Misc CSS fixes

  * set max content width to 960px
  * created mixin for bold font
  * move app-header content to global header
  * minor global changes
  * changed input alignment for network config inputs
  * added pop-out button class
  * changed lightgrey color
  * fixed accordion header actions responsiveness
  * fixed input box border colors

Change-Id: Iffe26d526439d7f2bb6808528a975ab7374ff1b2
Signed-off-by: Michael Davis <michael.s.davis@ibm.com>
diff --git a/app/common/styles/layout/content.scss b/app/common/styles/layout/content.scss
index 1547e30..13dbe44 100644
--- a/app/common/styles/layout/content.scss
+++ b/app/common/styles/layout/content.scss
@@ -7,6 +7,7 @@
   position: relative;
   border-bottom: 1px solid $lightbg__grey;
   margin: 1.625em 0 1.2em 0;
+  padding-left: 0;
   .h4 {
     padding: 0;
     margin: 0 0 .5em 0;