Update dialog padding per design spec

Change-Id: I8df3a3780b8e08e5124c93968cf2d28a62bec74b
(cherry picked from commit b282f67c43)

polygerrit-ui/app/elements/change/gr-confirm-abandon-dialog/gr-confirm-abandon-dialog.html

@@ -45,7 +45,7 @@ limitations under the License.
         width: 73ch; /* Add a char to account for the border. */
 
         --iron-autogrow-textarea {
-          border: 1px solid #ddd;
+          border: 1px solid #cdcdcd;
           box-sizing: border-box;
           font-family: var(--monospace-font-family);
         }

polygerrit-ui/app/elements/change/gr-confirm-revert-dialog/gr-confirm-revert-dialog.html

@@ -40,7 +40,7 @@ limitations under the License.
         width: 73ch; /* Add a char to account for the border. */
 
         --iron-autogrow-textarea {
-          border: 1px solid #ddd;
+          border: 1px solid #cdcdcd;
           box-sizing: border-box;
           font-family: var(--monospace-font-family);
         }

polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.html

@@ -52,8 +52,8 @@ limitations under the License.
         max-height: 90vh;
       }
       section {
-        border-top: 1px solid #ddd;
+        border-top: 1px solid #cdcdcd;
-        padding: .5em .75em;
+        padding: .5em 1.5em;
         width: 100%;
       }
       .peopleContainer,

polygerrit-ui/app/elements/core/gr-keyboard-shortcuts-dialog/gr-keyboard-shortcuts-dialog.html

@@ -33,7 +33,7 @@ limitations under the License.
       }
       header {
         align-items: center;
-        border-bottom: 1px solid #ddd;
+        border-bottom: 1px solid #cdcdcd;
         display: flex;
         justify-content: space-between;
       }

polygerrit-ui/app/elements/diff/gr-confirm-delete-comment-dialog/gr-confirm-delete-comment-dialog.html

@@ -45,7 +45,7 @@ limitations under the License.
         width: 73ch; /* Add a char to account for the border. */
 
         --iron-autogrow-textarea {
-          border: 1px solid #ddd;
+          border: 1px solid #cdcdcd;
           box-sizing: border-box;
           font-family: var(--monospace-font-family);
         }

polygerrit-ui/app/elements/settings/gr-registration-dialog/gr-registration-dialog.html

@@ -35,13 +35,13 @@ limitations under the License.
         margin-bottom: 1em;
       }
       header {
-        border-bottom: 1px solid #ddd;
+        border-bottom: 1px solid #cdcdcd;
         font-family: var(--font-family-bold);
       }
       header,
       main,
       footer {
-        padding: .5em .65em;
+        padding: .5em 1.5em;
       }
       footer {
         display: flex;

polygerrit-ui/app/elements/shared/gr-confirm-dialog/gr-confirm-dialog.html

@@ -31,7 +31,7 @@ limitations under the License.
         max-height: 90vh;
       }
       header {
-        border-bottom: 1px solid #ddd;
+        border-bottom: 1px solid #cdcdcd;
         flex-shrink: 0;
         font-family: var(--font-family-bold);
       }
@@ -43,7 +43,7 @@ limitations under the License.
       header,
       main,
       footer {
-        padding: .5em .65em;
+        padding: .5em 1.5em;
       }
       footer {
         display: flex;