UI: align-top keys in sys info and metadata

Minor fix that annoyed me. The default valign of
the keys in the sysinfo table hides the name of the
key for large blocks of text.
Before: https://screenshot.googleplex.com/9LNoEJ7o5NJ59ao
After: https://screenshot.googleplex.com/5RebAVMbExtEmu7

Change-Id: I947e9aa9846cb4e3e0b3d3a38d921984280b7420

ui/src/assets/trace_info_page.scss

@@ -86,6 +86,7 @@
           padding: 5px;
           word-break: break-all;
           white-space: pre-wrap;
+          vertical-align: top;
           &:first-of-type {
             font-weight: 800;
           }