Added svg for copy icon - I'm not a designer, someone else should probably replace these!

Signed-off-by: Oliver Hunt <oliver@hunt.bz>

Author: ollieh

src/skins/vector/css/matrix-react-sdk/views/rooms/_EventTile.scss

@@ -341,7 +341,7 @@ limitations under the License.
     right: 6px;
     width: 19px;
     height: 19px;
-    background-image: url($edit-button-url);
+    background-image: url($copy-button-url);
 }
 .mx_EventTile_body pre {
     position: relative;

src/skins/vector/css/themes/_base.scss

@@ -102,6 +102,7 @@ $event-redacted-img: url('../../img/redacted.jpg');
 $event-timestamp-color: #acacac;
 
 $edit-button-url: "../../img/icon_context_message.svg";
+$copy-button-url: "../../img/icon_copy_message.svg";
 
 // e2e
 $e2e-verified-color: #76cfa5; // N.B. *NOT* the same as $accent-color
@@ -114,4 +115,4 @@ $lightbox-fg-color: #ffffff;
 $lightbox-border-color: #ffffff;
 
 // unused?
-$progressbar-color: #000;
+$progressbar-color: #000;

src/skins/vector/css/themes/_dark.scss

@@ -102,6 +102,7 @@ $event-redacted-img: url('../../img/redacted-dark.jpg');
 $event-timestamp-color: #acacac;
 
 $edit-button-url: "../../img/icon_context_message_dark.svg";
+$copy-button-url: "../../img/icon_copy_message_dark.svg";
 
 // e2e
 $e2e-verified-color: #76cfa5; // N.B. *NOT* the same as $accent-color