Style translation box so only last two lines are visible

- Apply non-visible scrolling
- Inverse flex direction so last two text lines stay fixed to the bottom of the box

streaming-react-app/src/StreamingInterface.css

@@ -54,3 +54,12 @@
 .text-chunk-sra {
   margin-bottom: 12px;
 }
+
+.translation-text-container-sra div:nth-child(2) {
+  max-height: 4.68rem;
+  overflow: hidden;
+  white-space: pre-line;
+  display: flex;
+  flex-direction: column-reverse;
+}
+