feat: add filter dropdown #26 (#142)

feat(FilterItemDropdown): added a filter dropdown component from #26 

* fix(react-multi-select-component): adjusted the component to fit in with other components when comparing across multiple browsers. (where firefox consistently handles pixels and rem's, chromium doesn't agree).

refactor(input): removed shadow from input components to match react-multi-select-component look where needed.

refactor(SwitchGroup): added a small top margin for a less dense look. cleaned up surrounding code.

refactor(DeleteModal): adjusted the background color to fit more nicely across dark/light themes. made the exclamation icon bigger and removed the circle container.

refactor(Logs): adjusted text color on the light theme. cleaned up the code.

refactor(FilterAddForm): adapted to conform with the changes.

feat(FilterItemDropdown): added a dropdown component to the filter list as proposed in #26. could use a better look, though. also, cleaned up surrounding code and got rid of pesky negative margins.

refactor(FilterListItem): made the table striped when using the dark theme. adapter for the dropdown component.

refactor(filters/details):
- removed needless border properties from remove button, which left artifacts after de-focusing the button. also, removed the shadow from the cancel button.
- added invalidation of the filter list on a delete mutation before redirecting to /filters.
- modified certain group descriptions a bit in order to make them a bit more concise.
- overall, cleaned up the surrounding code further.

web/src/screens/Base.tsx

@@ -5,9 +5,9 @@ import { Disclosure, Menu, Transition } from "@headlessui/react";
 import { ExternalLinkIcon } from "@heroicons/react/solid";
 import { ChevronDownIcon, MenuIcon, XIcon } from "@heroicons/react/outline";
 
-import Logs from "./Logs";
 import Settings from "./Settings";
 
+import { Logs } from "./Logs";
 import { Releases } from "./Releases";
 import { Dashboard } from "./Dashboard";
 import { FilterDetails, Filters } from "./filters";