docs(sass): add missing docs to sass variables

packages/core/src/components/app/app.ios.vars.scss

@@ -5,4 +5,5 @@
 // iOS App
 // --------------------------------------------------
 
+/// @prop - Statusbar padding for the app
 $app-ios-statusbar-padding:       20px !default;

packages/core/src/components/app/app.md.vars.scss

@@ -6,4 +6,5 @@
 // Material Design App
 // --------------------------------------------------
 
+/// @prop - Statusbar padding for the app
 $app-md-statusbar-padding:       20px !default;

packages/core/src/components/footer/footer.ios.vars.scss

@@ -3,5 +3,5 @@
 // iOS Footer
 // --------------------------------------------------
 
+/// @prop - Filter of the translucent footer
 $footer-ios-translucent-filter:    saturate(180%) blur(20px) !default;
-

packages/core/src/components/header/header.ios.vars.scss

@@ -3,5 +3,5 @@
 // iOS Header
 // --------------------------------------------------
 
+/// @prop - Filter of the translucent header
 $header-ios-translucent-filter:    saturate(180%) blur(20px) !default;
-

packages/core/src/components/loading/loading.vars.scss

@@ -3,5 +3,5 @@
 // Loading
 // --------------------------------------------------
 
-/// @prop - Color of the backdrop
+/// @prop - Color of the loading backdrop
 $loading-backdrop-color: #000 !default;

packages/core/src/components/modal/modal.vars.scss

@@ -21,5 +21,5 @@ $modal-inset-height-small:      500px !default;
 /// @prop - Height of the large modal inset
 $modal-inset-height-large:      600px !default;
 
-/// @prop - Color of the backdrop
+/// @prop - Color of the modal backdrop
 $modal-backdrop-color:        #000 !default;

packages/core/src/components/popover/popover.vars.scss

@@ -3,5 +3,5 @@
 // Popover
 // --------------------------------------------------
 
-/// @prop - Color of the backdrop
+/// @prop - Color of the popover backdrop
 $popover-backdrop-color: #000 !default;