INT-1521 Unhide Intercom overlay button (#421)

Revert Intercom customizations from INT-864, INT-1087

Author: kangas

src/app/metrics/index.less

@@ -1,29 +0,0 @@
-#intercom-launcher {
-  height: 0px !important;
-  width: 0px !important;
-
-  .intercom-launcher-button {
-    display: none !important;
-  }
-}
-
-.intercom-sheet-header-minimize-button {
-  height: 0px !important;
-  width: 0px !important;
-  display: none !important;
-  pointer-events: none !important;
-  -webkit-pointer-events: none !important;
-}
-
-// style overrides for incoming messages
-#intercom-container .intercom-launcher-preview-caret {
-  display: none !important;
-}
-
-#intercom-container .intercom-launcher-preview.intercom-launcher-preview-multi-line {
-  right: 0 !important;
-}
-
-#intercom-container .intercom-launcher-badge {
-  z-index: 10 !important;
-}