UI: Improve md-switch hover colour in light theme when it is on

Screen recording: https://imgur.com/a/HApcWqb

Release-Notes: skip
Change-Id: Iafd9f09377a1b942608c4925b3fc67246e8bf33d
Signed-off-by: Paladox none <thomasmulhall410@yahoo.com>

polygerrit-ui/app/styles/themes/app-theme.ts

diff --git a/polygerrit-ui/app/styles/themes/app-theme.ts b/polygerrit-ui/app/styles/themes/app-theme.ts
index 06832c1..5febc92 100644
--- a/polygerrit-ui/app/styles/themes/app-theme.ts
+++ b/polygerrit-ui/app/styles/themes/app-theme.ts
@@ -561,7 +561,7 @@
     --switch-color-outline: #707783;
     --switch-color-primary: #005290;
     --switch-color-on-primary: #ffffff;
-    --switch-color-primary-container: #0077ce;
+    --switch-color-primary-container: #d7e2ff;
     --switch-color-on-primary-container: #ffffff;
   }
   @media screen and (max-width: 50em) {