fix(demo): Fix typos in demo messages

In the "all content" tab, "SOURCE" should say "Source", and "Live."
should say "Live".

Change-Id: I3267fd10662898bf45764057dd6e0fa017976267

demo/locales/en.json

@@ -95,7 +95,7 @@
   "DEMO_LICENSE_HEADER_VALUE": "Header Value",
   "DEMO_LICENSE_SERVER_URL": "Custom License Server URL",
   "DEMO_LIVE": "Live",
-  "DEMO_LIVE_SEARCH": "Live.",
+  "DEMO_LIVE_SEARCH": "Live",
   "DEMO_LOG_LEVEL": "Log Level",
   "DEMO_LOG_LEVEL_DEBUG": "Debug",
   "DEMO_LOG_LEVEL_INFO": "Info",
@@ -154,7 +154,7 @@
   "DEMO_SHAKA": "Shaka",
   "DEMO_SHAKA_CONTROLS": "Shaka Controls",
   "DEMO_SOURCE": "Source on GitHub",
-  "DEMO_SOURCE_SEARCH": "SOURCE",
+  "DEMO_SOURCE_SEARCH": "Source",
   "DEMO_STALL_DETECTOR_ENABLED": "Stall Detector Enabled",
   "DEMO_STALL_THRESHOLD": "Stall Threshold",
   "DEMO_START_AT_SEGMENT_BOUNDARY": "Start At Segment Boundary",

demo/locales/source.json

@@ -621,7 +621,7 @@
   },
   "DEMO_SOURCE_SEARCH": {
     "description": "A header on a search field that filters by the source of the asset.",
-    "message": "SOURCE"
+    "message": "Source"
   },
   "DEMO_STALL_DETECTOR_ENABLED": {
     "description": "The name of a configuration value.",