Various Dark Theme fixes per QA feedback (#1212)

* Fix CORS issue on in-line theming javascript

* Fix date picker icon color

* Add comment

* Fix table theming in dark mode

* Selfhosted navbar fix

* Rename selector to avoid clashing with bootstrap

* Do not set initial theme if default

* Fix .text-danger style in dropdown lists

* Fix toast style, restructure toast and card scss

* Fix table and dropdown list hover color

* Use callout component for Disable Send warning

* Remove unneeded theming for hovering over links

* Undo changes to register enterprise2 layout

* Apply theming to Safari input field icons

e.g. Caps lock, password autofill

* Selectively apply themed logo CSS

* Fix unrelated linting

* Fix webpack config to bundle theme.js

Co-authored-by: Danny Murphy <6512845+dltmurphy@users.noreply.github.com>

package.json

@@ -47,6 +47,7 @@
     "file-loader": "^6.2.0",
     "gh-pages": "^3.1.0",
     "html-loader": "^1.3.2",
+    "html-webpack-injector": "1.1.4",
     "html-webpack-plugin": "^4.5.1",
     "mini-css-extract-plugin": "^1.5.0",
     "sass": "^1.32.10",