Make appbar notification icons consistent accross new UI pages (#659)

* Swap enableNotifications flag to on by default

the enableNotifications flag on the template.purs was true by default.
It made more sense to be disableNotifications and false by default, so
that the most common case is the unset case.

* Remove inherit colour inline style on logout icon

logout icon was set to inherit colour which meant it was unaffected by
theming. Removed this style.

Source/Plugins/Core/com.equella.core/js/src/MainUI/Template.purs

@@ -137,7 +137,7 @@ type TemplateProps = (
  menuMode :: String,
  fullscreenMode :: String,
  hideAppBar :: Boolean, 
- enableNotifications :: Boolean,
+ disableNotifications :: Boolean,
  innerRef :: Nullable (EffectFn1 (Nullable TemplateRef) Unit),
  errorResponse :: Nullable ErrorResponse
 )
@@ -172,7 +172,7 @@ templateDefaults title = {
  fixedViewPort:nullAny,
  preventNavigation:nullAny, 
  menuExtra:nullAny, 
- enableNotifications: true,
+ disableNotifications: false,
  tabs:nullAny, 
  backRoute: nullAny, 
  footer: nullAny, 
@@ -300,15 +300,14 @@ templateClass = withStyles ourStyles $ R.component "Template" $ \this -> do
  userMaybe l = user ^? (_Just <<< l)
  userMenu = D.div [DP.className classes.userMenu ] $ (fromMaybe [] $ toMaybe menuExtra) <>
  (
- (guard $ props.enableNotifications && (not $ fromMaybe true $ userMaybe _guest)) *>
+ (guard $ not props.disableNotifications && (not $ fromMaybe true $ userMaybe _guest)) *>
  [
  hidden {mdDown:true} [
  badgedLink "assignment" _tasks "access/tasklist.do" topBarString.tasks , 
  badgedLink "notifications" _notifications "access/notifications.do" topBarString.notifications
  ],
  tooltip {title: strings.menu.title} $ 
- iconButton {"aria-label": strings.menu.title, 
- color: inherit, 
+ iconButton {"aria-label": strings.menu.title,
  onClick: withCurrentTarget $ d <<< UserMenuAnchor <<< Just} 
  [ icon_ [ D.text "account_circle"] ],
  menu {