Fix SiW height mismatch

Author: colin-grant-work

packages/search-in-workspace/src/browser/styles/index.css

@@ -16,12 +16,19 @@
 
 #search-in-workspace {
   height: 100%;
+  position: relative;
 }
 
 #search-in-workspace .theia-TreeContainer.empty {
   overflow: hidden;
 }
 
+#search-in-workspace .theia-progress-bar-container {
+    position: absolute;
+    top: 0;
+    left: 0;
+}
+
 .t-siw-search-container {
   padding: 0px 1px;
   display: flex;