Redesign resource tree (#1865)

* start redesign work

* add left padding to all tree nodes

* fiddling with padding

* align tab bar line with first item in resource tree

* final touch ups

* fix a strange password manager autofill prompt

* add keyboard shortcuts

* revert testing change

* nudge messagebar to layout row height

* tidy up

* switch to Allotment to stop ResizeObserver issues with monaco

* refmt and fix lints

* fabric touch-ups

* update snapshots

* remove explicit react-icons dependency

* reinstall packages

* remove background from FluentProvider

* fix alignment of message bar

* undo temporary workaround

* restore refresh button

* fix e2e tests and reformat

* fix compiler error

* remove uiw/react-split

* uncomment selection change on expand

package-lock.json

@@ -51,8 +51,8 @@
         "@types/lodash": "4.14.171",
         "@types/mkdirp": "1.0.1",
         "@types/node-fetch": "2.5.7",
-        "@uiw/react-split": "5.9.3",
         "@xmldom/xmldom": "0.7.13",
+        "allotment": "1.20.2",
         "applicationinsights": "1.8.0",
         "bootstrap": "3.4.1",
         "canvas": "2.11.2",
@@ -13063,17 +13063,6 @@
         "url": "https://opencollective.com/typescript-eslint"
       }
     },
-    "node_modules/@uiw/react-split": {
-      "version": "5.9.3",
-      "license": "MIT",
-      "funding": {
-        "url": "https://jaywcjlove.github.io/#/sponsor"
-      },
-      "peerDependencies": {
-        "react": ">=16.8.0",
-        "react-dom": ">=16.8.0"
-      }
-    },
     "node_modules/@ungap/url-search-params": {
       "version": "0.2.2",
       "license": "ISC"
@@ -13496,6 +13485,28 @@
         "ajv": "^6.9.1"
       }
     },
+    "node_modules/allotment": {
+      "version": "1.20.2",
+      "resolved": "https://registry.npmjs.org/allotment/-/allotment-1.20.2.tgz",
+      "integrity": "sha512-TaCuHfYNcsJS9EPk04M7TlG5Rl3vbAdHeAyrTE9D5vbpzV+wxnRoUrulDbfnzaQcPIZKpHJNixDOoZNuzliKEA==",
+      "dependencies": {
+        "classnames": "^2.3.0",
+        "eventemitter3": "^5.0.0",
+        "lodash.clamp": "^4.0.0",
+        "lodash.debounce": "^4.0.0",
+        "lodash.isequal": "^4.5.0",
+        "use-resize-observer": "^9.0.0"
+      },
+      "peerDependencies": {
+        "react": "^17.0.0 || ^18.0.0",
+        "react-dom": "^17.0.0 || ^18.0.0"
+      }
+    },
+    "node_modules/allotment/node_modules/eventemitter3": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-5.0.1.tgz",
+      "integrity": "sha512-GWkBvjiSZK87ELrYOSESUYeVIc9mvLLf/nXalMOS5dYrgZq9o5OVkbZAVM06CVxYsCwH9BDZFPlQTlPA1j4ahA=="
+    },
     "node_modules/anser": {
       "version": "1.4.10",
       "license": "MIT"
@@ -27962,6 +27973,11 @@
       "version": "4.3.0",
       "license": "MIT"
     },
+    "node_modules/lodash.clamp": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/lodash.clamp/-/lodash.clamp-4.0.3.tgz",
+      "integrity": "sha512-HvzRFWjtcguTW7yd8NJBshuNaCa8aqNFtnswdT7f/cMd/1YKy5Zzoq4W/Oxvnx9l7aeY258uSdDfM793+eLsVg=="
+    },
     "node_modules/lodash.clonedeep": {
       "version": "4.5.0",
       "license": "MIT"
@@ -28012,7 +28028,8 @@
     },
     "node_modules/lodash.isequal": {
       "version": "4.5.0",
-      "dev": true,
+      "resolved": "https://registry.npmjs.org/lodash.isequal/-/lodash.isequal-4.5.0.tgz",
+      "integrity": "sha512-pDo3lu8Jhfjqls6GkMgpahsF9kCyayhgykjyLMNFTKWrpVdAQtYyB4muAMWozBB4ig/dtWAmsMxLEI8wuz+DYQ==",
       "license": "MIT"
     },
     "node_modules/lodash.isinteger": {
@@ -35658,6 +35675,18 @@
         "react-dom": ">=16.8.0 <19.0.0"
       }
     },
+    "node_modules/use-resize-observer": {
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/use-resize-observer/-/use-resize-observer-9.1.0.tgz",
+      "integrity": "sha512-R25VqO9Wb3asSD4eqtcxk8sJalvIOYBqS8MNZlpDSQ4l4xMQxC/J7Id9HoTqPq8FwULIn0PVW+OAqF2dyYbjow==",
+      "dependencies": {
+        "@juggle/resize-observer": "^3.3.1"
+      },
+      "peerDependencies": {
+        "react": "16.8.0 - 18",
+        "react-dom": "16.8.0 - 18"
+      }
+    },
     "node_modules/use-sync-external-store": {
       "version": "1.2.0",
       "license": "MIT",