fix: increase border contrast ratio for more theme elements

Initially I added these changes to Help Center directly. It turns
out that doing so would amount to a breaking change for customers
who assume that these elements will remain the same color in their
custom themes. To err on the side of caution, I am adding them
to the Copenhagen theme instead.

style.css

@@ -590,6 +590,7 @@ ul {
 
 .form-field .nesty-input {
   border-radius: 4px;
+  border: 1px solid #87929D;
   height: 40px;
   line-height: 40px;
   outline: none;
@@ -601,6 +602,10 @@ ul {
   text-decoration: none;
 }
 
+.form-field .hc-multiselect-toggle {
+  border: 1px solid #87929D;
+}
+
 .form-field .hc-multiselect-toggle:focus {
   outline: none;
   border: 1px solid $brand_color;
@@ -5058,7 +5063,7 @@ html[dir="rtl"] .notification-left-aligned {
 
 .dropdown-menu {
   background: #fff;
-  border: 1px solid #d8d8d8;
+  border: 1px solid #87929D;
   border-radius: 3px;
   box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
   display: none;
@@ -5194,3 +5199,13 @@ html[dir="rtl"] .notification-left-aligned {
 .content-tag-list li:last-child {
   border: none;
 }
+
+/***** WYSIWYG Editor *****/
+#hc-wysiwyg {
+  border: 1px solid #87929D;
+}
+
+/***** Upload Dropzone *****/
+.upload-dropzone {
+  border: 1px solid #87929D;
+}

styles/_dropdowns.scss

@@ -23,7 +23,7 @@
 
 .dropdown-menu {
   background: #fff;
-  border: 1px solid rgb(216, 216, 216);
+  border: 1px solid $high-contrast-border-color;
   border-radius: 3px;
   box-shadow: 0 1px 5px rgba(0, 0, 0 , .1);
   display: none;

styles/_forms.scss

@@ -37,6 +37,7 @@
 // Select box
 .form-field .nesty-input {
   border-radius: 4px;
+  border: 1px solid $high-contrast-border-color;
   height: 40px;
   line-height: 40px;
   outline: none;
@@ -48,6 +49,12 @@
   }
 }
 
+.form-field .hc-multiselect {
+  &-toggle {
+    border: 1px solid $high-contrast-border-color;
+  }
+}
+
 .form-field .hc-multiselect-toggle:focus {
   outline: none;
   border: 1px solid $brand_color;

styles/_upload_dropzone.scss

@@ -0,0 +1,4 @@
+/***** Upload Dropzone *****/
+.upload-dropzone {
+  border: 1px solid $high-contrast-border-color;
+}

styles/_wysiwyg.scss

@@ -0,0 +1,4 @@
+/***** WYSIWYG Editor *****/
+#hc-wysiwyg {
+  border: 1px solid $high-contrast-border-color;
+}

styles/index.scss

@@ -41,3 +41,5 @@
 @import "notifications";
 @import "dropdowns";
 @import "content-tags";
+@import "wysiwyg";
+@import "upload_dropzone";