Pull request #730: + client: Add Hot Module Replacement

Merge in DNS/adguard-home from feature/hmr to master

Squashed commit of the following:

commit 952ed1955c2a7a32446d99489f137f02eb47c99e
Merge: 83484931 de92c852
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Thu Aug 13 11:02:10 2020 +0300

    Merge branch 'master' into feature/hmr

commit 8348493105d7d63d8b0836a5c272df2b17a6b142
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed Aug 5 15:07:31 2020 +0300

    Remove empty prop types, remove Services empty container

commit b2fe4a30b79d91e482318ee5deea8e49c7038f7e
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed Aug 5 13:56:35 2020 +0300

    Move constants

commit f8be4c18c35193ad77bf5e25f311ad834c1d6870
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed Aug 5 13:19:02 2020 +0300

    Fix Setup bug, update webpack.dev

commit 1d9cc4ddf8af2c979eb707a7f0fc06744eec186c
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed Aug 5 12:10:38 2020 +0300

    Review changes

commit a1edb21358def21ed1808b081ffc2f0b6755e3da
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed Aug 5 11:46:58 2020 +0300

    Remove lazy loading, fix updated components

commit 0aa2cf55f8d4206ac9e2f99fc1b990ed8a9c7825
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Tue Aug 4 20:32:19 2020 +0300

    Refactor App component, add lazy loading

commit 3c2ba4772a91ff7b06641dba6c6bf3fdcd2fdf7f
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Tue Aug 4 17:12:41 2020 +0300

    Simplify App hot loading boilerplate, setup lazy loading, update Header

commit 8df3221f315372b066f2ac0c9a1687f1677b8415
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Tue Aug 4 15:16:06 2020 +0300

    + client: Add Hot Module Replacement

client/src/components/Logs/Logs.css

@@ -437,7 +437,7 @@
 }
 
 .custom-select__arrow--left {
-    background: #fff url('./chevron-down.svg') no-repeat;
+    background: var(--white) url('../ui/svg/chevron-down.svg') no-repeat;
     background-position: 5px 9px;
     background-size: 22px;
 }