fix(ui): eliminate copy button icon misaligned in Firefox (#7542)

Closes #7481

Author: GhBogdan97

src/style/_buttons.scss

@@ -171,6 +171,9 @@ button
 .copy-to-clipboard
 {
   position: absolute;
+  display: flex;
+  justify-content: center;
+  align-items: center;
   bottom: 10px;
   right: 100px;
   width: 30px;
@@ -181,10 +184,11 @@ button
 
   button
   {
-    padding-left: 25px;
+    flex-grow: 1;
+    flex-shrink: 1;
     border: none;
     height: 25px;
-    background: url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' aria-hidden='true'><path fill='#ffffff' fill-rule='evenodd' d='M2 13h4v1H2v-1zm5-6H2v1h5V7zm2 3V8l-3 3 3 3v-2h5v-2H9zM4.5 9H2v1h2.5V9zM2 12h2.5v-1H2v1zm9 1h1v2c-.02.28-.11.52-.3.7-.19.18-.42.28-.7.3H1c-.55 0-1-.45-1-1V4c0-.55.45-1 1-1h3c0-1.11.89-2 2-2 1.11 0 2 .89 2 2h3c.55 0 1 .45 1 1v5h-1V6H1v9h10v-2zM2 5h8c0-.55-.45-1-1-1H8c-.55 0-1-.45-1-1s-.45-1-1-1-1 .45-1 1-.45 1-1 1H3c-.55 0-1 .45-1 1z'></path></svg>") center center no-repeat;
+    background: url("data:image/svg+xml, <svg xmlns='http://www.w3.org/2000/svg' width='16' height='15' aria-hidden='true'><g transform='translate(2, -1)'><path fill='#ffffff' fill-rule='evenodd' d='M2 13h4v1H2v-1zm5-6H2v1h5V7zm2 3V8l-3 3 3 3v-2h5v-2H9zM4.5 9H2v1h2.5V9zM2 12h2.5v-1H2v1zm9 1h1v2c-.02.28-.11.52-.3.7-.19.18-.42.28-.7.3H1c-.55 0-1-.45-1-1V4c0-.55.45-1 1-1h3c0-1.11.89-2 2-2 1.11 0 2 .89 2 2h3c.55 0 1 .45 1 1v5h-1V6H1v9h10v-2zM2 5h8c0-.55-.45-1-1-1H8c-.55 0-1-.45-1-1s-.45-1-1-1-1 .45-1 1-.45 1-1 1H3c-.55 0-1 .45-1 1z'></path></g></svg>") center center no-repeat;
   }
 }
 
@@ -195,9 +199,9 @@ button
   right: 10px;
   width: 20px;
   height: 20px;
+
   button
   {
-    padding-left: 18px;
-    height: 18px
+    height: 18px;
   }
 }

src/style/_layout.scss

@@ -717,6 +717,9 @@
   color: white;
   font-size: 14px;
   height: 30px;
+  justify-content: center;
+  align-items: center;
+  display: flex;
 }
 
 .scheme-container