Bump Blueprint; remove obsolete hotfixes, deprecations (#2773)

* Bump minimum Blueprint version

Done to allow compatibility with new React 18 `createRoot`.

* Migrate from deprecated `Tooltip2`, `Popover2`

Done partially so far, with the full migration in a subsequent commit.

* Migrate more components to fix deprecations

* Update test snapshots

* Migrate remaining components to fix deprecations

* Remove deprecated package from `requireProvider`

This would necessitate a corresponding change in modules to ensure they
don't import the deprecated package, or simply just mark it as
non-external.

* Remove `@blueprintjs/popover2` package completely

* Fix format

* Fix format

* Reformat files post-merge

* Bump Blueprint version

* Use BP `Classes` utility instead of raw strings

Prevents regressions when the CSS namespace changes in the meantime
while we still have yet to migrate away fully from the CSS API.

* Fix lint

* Migrate to new notifications API

Removes the old hotfix now that Blueprint supports it.

Author: RichDom2185

package.json

@@ -26,11 +26,10 @@
     "prepare": "husky"
   },
   "dependencies": {
-    "@blueprintjs/core": "^5.7.0",
-    "@blueprintjs/datetime2": "^2.2.7",
-    "@blueprintjs/icons": "^5.5.0",
-    "@blueprintjs/popover2": "^2.0.0",
-    "@blueprintjs/select": "^5.0.0",
+    "@blueprintjs/core": "^5.10.1",
+    "@blueprintjs/datetime2": "^2.3.3",
+    "@blueprintjs/icons": "^5.9.0",
+    "@blueprintjs/select": "^5.1.3",
     "@mantine/hooks": "^7.7.0",
     "@octokit/rest": "^20.0.0",
     "@reduxjs/toolkit": "^1.9.7",

src/commons/SimpleDropdown.tsx

@@ -1,13 +1,12 @@
-import { Button, Menu, MenuItem } from '@blueprintjs/core';
-import { Popover2 } from '@blueprintjs/popover2';
+import { Button, Menu, MenuItem, Popover } from '@blueprintjs/core';
 
 type OptionType = { value: any; label: string };
 type Props<T extends OptionType> = {
   options: T[];
   selectedValue?: T['value'];
   onClick?: (v: T['value']) => void;
   buttonProps?: Partial<React.ComponentProps<typeof Button> & { 'data-testid': string }>;
-  popoverProps?: Partial<React.ComponentProps<typeof Popover2>>;
+  popoverProps?: Partial<React.ComponentProps<typeof Popover>>;
 };
 
 const SimpleDropdown = <T extends OptionType>({
@@ -27,7 +26,7 @@ const SimpleDropdown = <T extends OptionType>({
   };
 
   return (
-    <Popover2
+    <Popover
       {...popoverProps}
       interactionKind="click"
       content={
@@ -39,7 +38,7 @@ const SimpleDropdown = <T extends OptionType>({
       }
     >
       <Button {...buttonProps}>{buttonLabel()}</Button>
-    </Popover2>
+    </Popover>
   );
 };