Move UI components to ui/ directory

ext/src/ui/popup/styles/index.css

@@ -0,0 +1,68 @@
+body {
+    background: -moz-dialog;
+    color: -moz-dialogtext;
+    margin: initial;
+    font: message-box;
+}
+
+.media-select {
+    border-bottom: 1px solid rgba(0, 0, 0, 0.25);
+    margin: 0 1em;
+    padding: 0.75em 0;
+}
+
+.media-select-dropdown {
+    display: inline-block;
+    margin: 0 0.5em;
+}
+
+.receivers {
+    list-style: none;
+    margin: initial;
+    padding: initial;
+}
+.receiver {
+    column-gap: 0.75em;
+    display: grid;
+    flex-direction: column;
+    grid-template-columns: min-content 1fr min-content;
+    grid-template-rows: min-content min-content 1fr;
+    grid-template-areas:
+        "name name connect"
+        "address status connect";
+    justify-content: center;
+    margin: 0 1em;
+    padding: 0.75em 0;
+    position: relative;
+}
+
+
+.receiver:not(:last-child) {
+    border-bottom: 1px solid rgba(0, 0, 0, 0.25);
+}
+
+.receiver-name,
+.receiver-address {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.receiver-name {
+    font-size: 1.1em;
+    grid-area: name;
+}
+.receiver-address {
+    color: GrayText;
+    grid-area: address;
+}
+.receiver-status {
+    grid-area: status;
+}
+.receiver-connect {
+    align-self: center;
+    grid-area: connect;
+    justify-self: end;
+    min-width: 100px;
+    height: 32px;
+}