Update references to variables in docs (#1238)

* Update navbar variables in component docs page

* Update pagination variables in component docs page

* Update tabs variables in component docs page

* Update button variables in element docs page

* Update table variables in element docs page

* Update title variables in element docs page

* Update variables template to support layout

* Add section variables in relevant docs page

* Add footer variables in relevant docs page

* Update variables template to support custom messages

* Add form generic variables in relevant docs page

* Update derived variables in relevant docs page

* Add generic variables to variables docs page

* Update sass files count in docs Modular page

docs/documentation/elements/button.html

@@ -46,8 +46,6 @@ variables:
   value: $white-ter
 - name: $button-static-border-color
   value: $grey-lighter
-- name: $button-shadow-inset
-  value: inset 0 1px 2px rgba($black, 0.2)
 ---
 
 {% capture button_example %}

docs/documentation/elements/table.html

@@ -16,8 +16,6 @@ variables:
   value: 0.5em 0.75em
 - name: $table-cell-heading-color
   value: $text-strong
-- name: $table-head-color
-  value: $grey
 - name: $table-head-cell-border-width
   value: 0 0 2px
 - name: $table-head-cell-color

docs/documentation/elements/title.html

@@ -10,10 +10,10 @@ variables:
   value: $size-3
 - name: $title-weight
   value: $weight-semibold
-- name: $title-strong-weight
-  value: inherit
 - name: $title-strong-color
   value: inherit
+- name: $title-strong-weight
+  value: inherit
 - name: $subtitle-color
   value: $grey-dark
 - name: $subtitle-size