removed obsolete vendor prefixes (and fixed broken gradients)

lib/plugins/extension/style.less

@@ -31,8 +31,6 @@
 
     img {
         box-shadow: 0 0 25px #111;
-        -webkit-box-shadow: 0 0 25px #111;
-        -moz-box-shadow: 0 0 25px #111;
         max-width: 90%;
         max-height: 90%;
     }

lib/tpl/dokuwiki/css/_media_fullscreen.css

@@ -216,7 +216,6 @@
     width: 100px;
     min-height: 130px;
     display: inline-block;
-    display: -moz-inline-stack;
     /* the right margin should visually be 10px, but because of its inline-block nature the whitespace inbetween is about 4px more */
     margin: 0 6px 10px 0;
     background-color: @ini_background_neu;

lib/tpl/dokuwiki/css/basic.less

@@ -353,8 +353,6 @@ progress {
     line-height: normal;
     margin: 0;
     vertical-align: middle;
-    -moz-box-sizing: border-box;
-    -webkit-box-sizing: border-box;
     box-sizing: border-box;
 }
 
@@ -407,7 +405,7 @@ button,
     color: #333;
     background-color: #eee;
     background-image: url(data:image/svg+xml;base64,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);
-    .linear-gradient("top, #ffffff 0%, #f4f4f4 30%, #eeeeee 99%, #cccccc 99%");
+    background-image: linear-gradient(to bottom, #ffffff 0%, #f4f4f4 30%, #eeeeee 99%, #cccccc 99%);
     border: 1px solid #ccc;
     border-radius: 2px;
     padding: .1em .5em;
@@ -436,7 +434,7 @@ button:focus,
     border-color: #999;
     background-color: #ddd;
     background-image:url(data:image/svg+xml;base64,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);
-    .linear-gradient("top, #ffffff 0%, #f4f4f4 30%, #dddddd 99%, #bbbbbb 99%");
+    background-image: linear-gradient(to bottom, #ffffff 0%, #f4f4f4 30%, #dddddd 99%, #bbbbbb 99%);
 }
 
 input::-moz-focus-inner,

lib/tpl/dokuwiki/css/content.less

@@ -118,7 +118,7 @@
 .dokuwiki dl.file {
     dt {
         background-color: @ini_background_site;
-        .linear-gradient(~"top, @{ini_background_alt} 0%, @{ini_background_site} 100%");
+        background: linear-gradient(to bottom, @ini_background_alt 0%, @ini_background_site 100%);
         color: inherit;
         border: 1px solid @ini_border;
         border-bottom-color: @ini_background_site;

lib/tpl/dokuwiki/css/mixins.less

-/**
- * linear gradient x-browser support
- */
-.linear-gradient(@declaration: 0) {
-    background: -moz-linear-gradient(   @declaration);
-    background: -webkit-linear-gradient(@declaration);
-    background: -o-linear-gradient(     @declaration);
-    background: -ms-linear-gradient(    @declaration);
-    background: linear-gradient(        @declaration);
-}
\ No newline at end of file

lib/tpl/dokuwiki/style.ini

@@ -16,8 +16,6 @@
 
 [stylesheets]
 
-css/mixins.less           = screen
-
 css/basic.less            = screen
 css/_imgdetail.css        = screen
 css/_media_popup.css      = screen