Fork Slate and backport #slate/2772 and #slate/2800 to fix common crash cases

app/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "mailspring",
-  "version": "1.6.2",
+  "version": "1.6.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -3151,9 +3151,7 @@
       }
     },
     "slate": {
-      "version": "0.45.1",
-      "resolved": "https://registry.npmjs.org/slate/-/slate-0.45.1.tgz",
-      "integrity": "sha512-kEavVrC9lhIu6SX6Xy7GUpHsjfCcr+RQXKJ2X5v1NEdHsqIf0CCHChAarkEp65QK9qx7oRDti/KWOdnYMsXc7Q==",
+      "version": "github:bengotow/slate#398558065024005d2529f221c54144807a8ab4cf",
       "requires": {
         "debug": "3.2.6",
         "direction": "0.1.5",

app/package.json

@@ -60,7 +60,7 @@
     "rtlcss": "2.4.0",
     "runas": "getflywheel/node-runas#ca4f0714",
     "rx-lite": "4.0.8",
-    "slate": "0.45.1",
+    "slate": "github:bengotow/slate#0.45.1",
     "slate-auto-replace": "0.12.1",
     "slate-base64-serializer": "0.2.100",
     "slate-html-serializer": "0.7.39",