add darkmode themes, clean up

src/themes/system/afx-calendar-view.css

@@ -0,0 +1,7 @@
+afx-calendar-view afx-grid-view afx-grid-row:nth-child(even) afx-grid-cell
+{
+    background-color: transparent;
+}
+afx-calendar-view afx-grid-view .grid_row_header afx-grid-cell{
+    border-right: 0;
+}

src/themes/system/afx-label.css

@@ -1,3 +1,8 @@
 afx-label  i.icon-style {
     float: left;
+}
+afx-label  i.label-text{
+    font-weight: normal;
+    font-style: normal;
+    margin-left: 3px;
 }

src/themes/system/ubuntu-regular.css

@@ -0,0 +1,39 @@
+/*! Generated by Font Squirrel (https://www.fontsquirrel.com) on August 6, 2017 */
+
+
+
+@font-face {
+    font-family: 'Ubuntu';
+    src: url('fonts/ubuntu-regular-webfont.woff2') format('woff2'),
+         url('fonts/ubuntu-regular-webfont.woff') format('woff');
+    font-weight: normal;
+    font-style: normal;
+
+}
+
+@font-face {
+    font-family: 'Ubuntu';
+    src: url('fonts/ubuntu-bold-webfont.woff2') format('woff2'),
+         url('fonts/ubuntu-bold-webfont.woff') format('woff');
+    font-weight: bold;
+    font-style: normal;
+
+}
+
+@font-face {
+    font-family: 'Ubuntu';
+    src: url('fonts/ubuntu-bolditalic-webfont.woff2') format('woff2'),
+         url('fonts/ubuntu-bolditalic-webfont.woff') format('woff');
+    font-weight: bold;
+    font-style: italic;
+
+}
+
+@font-face {
+    font-family: 'Ubuntu';
+    src: url('fonts/ubuntu-italic-webfont.woff2') format('woff2'),
+         url('fonts/ubuntu-italic-webfont.woff') format('woff');
+    font-weight: normal;
+    font-style: italic;
+
+}