[CORL-561, CORL-562] Comment stream and account profile styling cleanup (#2517)

* update styles for comment stream

* more comment styling fixes

* reconfigure settings tab and account settings in stream

* add new button variant

* style settings tab

* style change username/email/password

* clean up settings tab

* integrate account deletion to account settings

* update comment history styles

* more history comment styles

* update snaps

* move userbox

* fix tests

* fix delete account tests

* update message box styling

* update snap

* update snaps

* fix lints

* update snaps again

* userbox styles

* history comment styling

* update snaps

* fix ts

* Integrate notifications settings

* clean up account setting styles

* update snaps and tests

* fix lints

* fix: PENDING_DELETION permissions

* chore: sync stable classnames, rename settings to account

* simplify css

* update snaps

src/core/client/ui/theme/mixins.css

@@ -2,7 +2,7 @@
   font-size: calc(16rem / var(--rem-base));
   font-weight: var(--font-weight-regular);
   font-family: var(--font-family-sans-serif);
-  line-height: calc(20em / 16);
+  line-height: calc(22em / 16);
   letter-spacing: calc(0.2em / 16);
   color: var(--palette-text-primary);
 }

src/core/client/ui/theme/variables.ts

@@ -56,6 +56,7 @@ const variables = {
       primary: "#3B4A53",
       secondary: "#787D80",
       light: "#fff",
+      dark: "#14171A",
     },
     /* Background colors */
     background: {