Added similar visited state for embed buttons.

src/mami.css/themes/archaic.css

@@ -169,6 +169,7 @@
 .umi--archaic .markup__link {
     color: #1e90ff;
 }
+.umi--archaic .markup__link--visited,
 .umi--archaic .markup__link:visited {
     color: #6B4F80;
 }

src/mami.css/themes/blue.css

@@ -169,6 +169,7 @@
 .umi--blue .markup__link {
     color: #1e90ff;
 }
+.umi--blue .markup__link--visited,
 .umi--blue .markup__link:visited {
     color: #6B4F80;
 }

src/mami.css/themes/dark.css

@@ -169,6 +169,7 @@
 .umi--dark .markup__link {
     color: #1e90ff;
 }
+.umi--dark .markup__link--visited,
 .umi--dark .markup__link:visited {
     color: #6B4F80;
 }

src/mami.css/themes/light.css

@@ -169,6 +169,7 @@
 .umi--light .markup__link {
     color: #1e90ff;
 }
+.umi--light .markup__link--visited,
 .umi--light .markup__link:visited {
     color: #6B4F80;
 }

src/mami.css/themes/purple.css

@@ -169,6 +169,7 @@
 .umi--purple .markup__link {
     color: #1e90ff;
 }
+.umi--purple .markup__link--visited,
 .umi--purple .markup__link:visited {
     color: #6B4F80;
 }

src/mami.js/parsing.js

@@ -209,6 +209,7 @@ Umi.Parsing = (function() {
             container.title = 'image';
             element.textContent = 'Remove';
             element.dataset.embed = '1';
+            element.classList.add('markup__link--visited');
 
             let html = $e({
                 tag: 'img',
@@ -262,6 +263,7 @@ Umi.Parsing = (function() {
             element.dataset.embed = '1';
             element.textContent = 'Remove';
             container.textContent = '';
+            element.classList.add('markup__link--visited');
 
             let media = $e({
                 tag: 'audio',
@@ -304,6 +306,7 @@ Umi.Parsing = (function() {
             container.title = 'video';
             element.dataset.embed = '1';
             element.textContent = 'Remove';
+            element.classList.add('markup__link--visited');
 
             let media = $e({
                 tag: 'video',
@@ -349,6 +352,7 @@ Umi.Parsing = (function() {
             target.textContent = container.dataset.shit;
             element.dataset.embed = '1';
             element.textContent = 'Hide';
+            element.classList.add('markup__link--visited');
         }
     };