Revert "Chore: Update Slate to 0.47.8 (#18412)" (#19167)

This reverts commit 601853fc84.

package.json

@@ -52,9 +52,7 @@
     "@types/redux-logger": "3.0.7",
     "@types/redux-mock-store": "1.0.1",
     "@types/reselect": "2.2.0",
-    "@types/slate": "0.47.1",
-    "@types/slate-plain-serializer": "0.6.1",
-    "@types/slate-react": "0.22.5",
+    "@types/slate": "0.44.11",
     "@types/tinycolor2": "1.4.2",
     "angular-mocks": "1.6.6",
     "autoprefixer": "9.5.0",
@@ -195,7 +193,6 @@
   },
   "dependencies": {
     "@babel/polyfill": "7.2.5",
-    "@grafana/slate-react": "0.22.9-grafana",
     "@torkelo/react-select": "2.4.1",
     "angular": "1.6.6",
     "angular-bindonce": "0.3.1",
@@ -246,8 +243,10 @@
     "rst2html": "github:thoward/rst2html#990cb89",
     "rxjs": "6.4.0",
     "search-query-parser": "1.5.2",
-    "slate": "0.47.8",
-    "slate-plain-serializer": "0.7.10",
+    "slate": "0.33.8",
+    "slate-plain-serializer": "0.5.41",
+    "slate-prism": "0.5.0",
+    "slate-react": "0.12.11",
     "tether": "1.4.5",
     "tether-drop": "https://github.com/torkelo/drop/tarball/master",
     "tinycolor2": "1.4.1",