Add credit card logos to allow displaying icons based on brand (#2163)

* Add credit card logos to allow displaying icons based on brand

* Add light and dark card icons and select based on theme

* Change usage of icon scss to the one in jslib

* Fix typos in scss import code

src/popup/scss/popup.scss

@@ -1,4 +1,7 @@
 @import "../../../jslib/angular/src/scss/webfonts.css";
+$dark-icon-themes: 'theme_dark', 'theme_solarizedDark', 'theme_nord';
+@import "../../../jslib/angular/src/scss/icons.scss";
+
 @import "variables.scss";
 @import "base.scss";
 @import "grid.scss";