[CORL-605] remove user agent margin on safari search bar (#2559)

* remove user agent padding on safari search bar

* remove margin on other text fields too

* add margin reset to TextField

src/core/client/admin/routes/Moderate/ModerateSearchBar/Field.css

@@ -56,11 +56,11 @@
   padding: calc(0.5 * var(--mini-unit));
   box-sizing: border-box;
   width: 100%;
-  line-height: 30px;
   align-self: stretch;
   color: var(--palette-text-light);
   border: 0;
   background-color: var(--palette-primary-darkest);
+  margin: 0;
 
   &:focus {
     outline: none;

src/core/client/ui/components/TextField/TextField.css

@@ -14,6 +14,8 @@
   border-radius: var(--round-corners);
   width: 100%;
   align-self: stretch;
+  margin-top: 0;
+  margin-bottom: 0;
 
   &:read-only {
     background-color: var(--palette-grey-lightest);