Fix loading css for larry skin, support minified css files

plugins/legacy_browser/legacy_browser.php

@@ -40,19 +40,20 @@ class legacy_browser extends rcube_plugin
         $skin  = $this->skin();
 
         if ($skin == 'classic') {
+            $minified = file_exists(INSTALL_PATH . '/plugins/legacy_browser/skins/classic/iehacks.min.css') ? '.min' : '';
             $rcube->output->add_header(
-                '<link rel="stylesheet" type="text/css" href="plugins/legacy_browser/classic/iehacks.css" />'
+                '<link rel="stylesheet" type="text/css" href="plugins/legacy_browser/skins/classic/iehacks' . $minified . '.css" />'
             );
         }
         else if ($skin == 'larry') {
-            if ($rcube->output->browser->ver < 8) {
+            $minified = file_exists(INSTALL_PATH . '/plugins/legacy_browser/skins/larry/iehacks.min.css') ? '.min' : '';
             $rcube->output->add_header(
-                    '<link rel="stylesheet" type="text/css" href="plugins/legacy_browser/larry/ie7hacks.css" />'
+                '<link rel="stylesheet" type="text/css" href="plugins/legacy_browser/skins/larry/iehacks' . $minified . '.css" />'
             );
-            }
+
-            else {
+            if ($rcube->output->browser->ver < 8) {
                 $rcube->output->add_header(
-                    '<link rel="stylesheet" type="text/css" href="plugins/legacy_browser/larry/iehacks.css" />'
+                    '<link rel="stylesheet" type="text/css" href="plugins/legacy_browser/skins/larry/ie7hacks' . $minified . '.css" />'
                 );
             }
         }

plugins/legacy_browser/skins/larry/iehacks.css

@@ -13,7 +13,9 @@
 	top: -6px;
 }
 
-input.button {
+input.button,
+a.disabled.button,
+.buttongroup {
 	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#f9f9f9', endColorstr='#e6e6e6', GradientType=0);
 }
 
@@ -33,11 +35,6 @@ input.button.mainaction:active {
 	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#2a2e31', endColorstr='#505050', GradientType=0);
 }
 
-a.button,
-.buttongroup {
-	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#f9f9f9', endColorstr='#e6e6e6', GradientType=0);
-}
-
 a.button.pressed,
 a.button:active,
 input.button:active {