Housekeeping for tab module

Added on hidden flag and cleaned flavor files as needed

docs/v2/DEVLOG.md

@@ -903,3 +903,4 @@
 - Updated `table` module's definitions and variables, added **hidden flag** `$include-striped-table` in order to make sure `.striped` `table`s can be turned on and off.
 - Cleanup of relevant variables and comments in flavor files.
 - Updated `card` module, splitting into main file and mixins, cleanup in flavor files for the module.
+- Updated `tab` module, adding an extra **hidden flag** `$include-stacked-tabs` for toggling `.stacked` tabs on and off, cleanup of flavor files.

src/mini/_tab.scss

@@ -2,9 +2,10 @@
 	Definitions for tabs/horizontal accordions.
 */
 // Dependency: This module is somewhat dependent on the grid system.
+$tab-container-name:			'tabs' !default;					// Class name for the tabs container.
+$include-stacked-tabs:		true !default;						// [Hidden flag] Should stacked tabs be included? (`true`/`false`).
+$tab-stacked-name:				'stacked' !default;				// Class name for stacked tabs container.
 // Tab styling
-$tab-container-name:			'tabs' !default;								// Class name for the tabs container
-$tab-stacked-name:				'stacked' !default;								// Class name for stacked tabs container
 .#{$tab-container-name} {
 	width: 100%;
 	opacity: 1;
@@ -151,6 +152,7 @@ $tab-stacked-name:				'stacked' !default;								// Class name for stacked tabs
 	}
 }
 // Stacked tabs
+@if $include-stacked-tabs { // Turn off if you don't want stacked tabs enabled (except on smaller screens for responsiveness)
 	.#{$tab-container-name}.#{$tab-stacked-name} {
 		// Old syntax
 		-webkit-box-orient: vertical;
@@ -204,6 +206,7 @@ $tab-stacked-name:				'stacked' !default;								// Class name for stacked tabs
 			}
 		}
 	}
+}
 // Responsiveness
 @media (max-width: #{$tab-stacked-breakpoint}) {
 	.#{$tab-container-name} {