Common enums used in the project -DRY

This is not all of them, just those found during the select rework.

src/utils/enums.js

@@ -0,0 +1,40 @@
+import {
+    BOTTOM,
+    DEFAULT,
+    LARGE,
+    SMALL,
+    TOP
+} from './constants';
+import {
+    ALT,
+    ARROWLEFT,
+    ARROWRIGHT,
+    CAPSLOCK,
+    CONTROL,
+    ENTER,
+    META,
+    SHIFT,
+    TAB,
+} from './kbEventKeys';
+
+export const PLACEMENT_LIST = Object.freeze([BOTTOM, TOP]);
+export const PLACEMENT_MAP = Object.freeze({
+    [BOTTOM]: TOP,
+    [TOP]: BOTTOM,
+});
+
+export const SMALL_LARGE_DEFAULT_LIST = Object.freeze([SMALL, LARGE, DEFAULT]);
+export const STRING_NUMBER_LIST = Object.freeze([String, Number]);
+export const STRING_NUMBER_ARRAY_LIST = Object.freeze([String, Number, Array]);
+
+export const IGNORE_KEY_LIST = Object.freeze([
+    ALT,
+    ARROWLEFT,
+    ARROWRIGHT,
+    CAPSLOCK,
+    CONTROL,
+    ENTER,
+    META,
+    SHIFT,
+    TAB,
+]);