initial scaffolding for inverted, custom message list

src/resources/kordophone.gresource.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/net/buzzert/kordophone2">
+    <file>style.css</file>
+  </gresource>
+</gresources>

src/resources/style.css

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+/* Kordophone application styles */
+
+.conversation-row {
+    padding: 8px 12px;
+    border-bottom: 1px solid alpha(#000, 0.1);
+}
+
+.conversation-row:selected {
+    background-color: alpha(@accent_bg_color, 0.50);
+}
+
+.message-list-scroller {
+    /* Invert the y-axis, so the messages are drawn bottom-to-top */
+    /* Individual messages are drawn upside down in the custom renderer */
+    transform: scale(1, -1);
+}