Progress indicator for processes - could be prettier, but functional for now

src/scss/global/_core.scss

@@ -262,6 +262,10 @@ button.placeholder {
 	@include clearfix;
 }
 
+.hidden {
+	display: none !important;
+}
+
 .pulse { @include pulse(); }
 .one-liner { @include one_line_text; }
 .centred-text { text-align: center; }

src/scss/global/_variables.scss

@@ -13,6 +13,7 @@ $black: #000000;
 $red: #cf2d2d;
 $green: #47af2a;
 $blue: #32b5f2;
+$light_blue: #96cfea;
 $yellow: #FFF39C;
 $orange: #f16f19;
 $overlay_dark: rgba(0, 0, 0, 0.88);