use SVG icon

_admin.php

@@ -58,7 +58,7 @@ class admin
         dcCore::app()->menu[dcAdmin::MENU_PLUGINS]->addItem(
             __('improve'),
             dcCore::app()->adminurl->get('admin.plugin.improve'),
-            dcPage::getPF('improve/icon.png'),
+            dcPage::getPF('improve/icon.svg'),
             preg_match('/' . preg_quote(dcCore::app()->adminurl->get('admin.plugin.improve')) . '(&.*)?$/', $_SERVER['REQUEST_URI']),
             dcCore::app()->auth->isSuperAdmin()
         );
@@ -81,8 +81,8 @@ class admin
             [
                 'title'       => __('improve'),
                 'url'         => dcCore::app()->adminurl->get('admin.plugin.improve'),
-                'small-icon'  => dcPage::getPF('improve/icon.png'),
-                'large-icon'  => dcPage::getPF('improve/icon-b.png'),
+                'small-icon'  => dcPage::getPF('improve/icon.svg'),
+                'large-icon'  => dcPage::getPF('improve/icon.svg'),
                 'permissions' => null,
             ]
         );

icon.svg

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="96px" height="96px" viewBox="0 0 96 96" enable-background="new 0 0 96 96" xml:space="preserve">  <image id="image0" width="96" height="96" x="0" y="0"
+    href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGAAAABgCAMAAADVRocKAAAABGdBTUEAALGPC/xhBQAAACBjSFJN
+AAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAb1BMVEUAAAAZe7oYdbEXcKoY
+d7QZebcYeLYZebcYeLYYdbIYeLYZebcZerkYd7QYebcZerkYeLUYeLYZerkYdrMZergZebgZerkY
+drMZe7kZe7kZe7pUm5ZwqYZgoZCGtXm60VybwG0gfrUjgLQhf7X///+xsszEAAAAGnRSTlMAAAEc
+W5q/5/kTb8b7GYjuB23vI8ZK61n4+4/r684AAAABYktHRCS0BvmZAAAACXBIWXMAAA7DAAAOwwHH
+b6hkAAAAB3RJTUUH5gsZFyQ2cTO68QAAAVhJREFUaN7tmtuSgkAMREfuAgIDCJq9r///jy6ou6Nr
+rBLSPKVfU9VHRiZFpWPMjTw/CKM4oaeVxFEY+J55rHWa5c97/ynP0vUD+01RznE/qSw2jH1l6/n2
+g2pb3fNvWhn7QW3z33/byfkTddsb+1W/k/Qn2vWrK0C/l/Un2vdX5yP8+8dncE6pET3/i7rff7oS
+fH9ctZe31d6vv7y6eptAsOf7y9yv9w9XnxMA9elOF0x5PoCKsb9x/UcAUA6dL+WqAgBKf/p/hgRk
+nvHZ/i8ByH0TsEUJAAUmxAJCE2EBkYmxgNjw3w8igMTwNREAKUABClCAAhSgAAUoQAEKUIACFKAA
+BShAAcsC4CM1+FAQPtaED2bho2X4cBw+3ocHFPiIBR4SsTHX17erwwT/c8zFBXXzZZeKGuFhKT7u
+xQfW+MgdvjSwwNoDfnEDv3oyhsvY5ZlB0us/R92SimGxNiE/AAAAJXRFWHRkYXRlOmNyZWF0ZQAy
+MDIyLTExLTI1VDIyOjM2OjU0KzAxOjAwL/FzDwAAACV0RVh0ZGF0ZTptb2RpZnkAMjAyMi0xMS0y
+NVQyMjozNjo1NCswMTowMF6sy7MAAAAASUVORK5CYII=" />
+</svg>