Restore material icon set (#154)

Closes: #153

Fixes a regression from the culling of extra icons and build files. Restores the basic material icon set which is used by the buttons in the f7 text editor.

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

Reviewed-on: #154

src/css/icons.css

@@ -27,3 +27,29 @@
   font-feature-settings: 'liga';
   text-align: center;
 }
+
+/* Material Icons for text editor toolbar */
+@font-face {
+  font-family: "Material Icons";
+  font-style: normal;
+  font-weight: 400;
+  font-display: block;
+  src: url("../fonts/material-icons.woff2") format("woff2"), url("../fonts/material-icons.woff") format("woff");
+}
+.material-icons {
+  font-family: "Material Icons";
+  font-weight: normal;
+  font-style: normal;
+  font-size: 24px;
+  line-height: 1;
+  letter-spacing: normal;
+  text-transform: none;
+  display: inline-block;
+  white-space: nowrap;
+  word-wrap: normal;
+  direction: ltr;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+  text-rendering: optimizeLegibility;
+  font-feature-settings: "liga";
+}