Rebase + Remove all unused image

src/main/twirl/gitbucket/core/repo/files.scala.html

@@ -27,7 +27,7 @@
         <a href="@url(repository)/tree/@encodeRefName(branch)/@pathList.take(i + 1).mkString("/")">@section</a> /
       }
       @if(hasWritePermission){
-        <a href="@url(repository)/new/@encodeRefName(branch)/@pathList.mkString("/")"><img src="@assets/common/images/newfile.png"/></a>
+        <a href="@url(repository)/new/@encodeRefName(branch)/@pathList.mkString("/")" title="Create a new file here" style="text-decoration: none;">+</i></a>
       }
     </div>
     <table class="table table-file-list">

src/main/webapp/assets/common/css/gitbucket.css

@@ -1360,13 +1360,15 @@ div.markdown-body table colgroup + tbody tr:first-child td:last-child {
 
 a.markdown-anchor-link {
   position: absolute;
-  left: -20px;
-  width: 32px;
-  height: 16px;
-  background-image: url(../images/link.png);
-  background-repeat: no-repeat;
+  left: -18px;
   display: none;
+  color: #999;
+  /* From octicon style */
+  font: normal normal normal 16px/1 octicons;
+  text-decoration: none;
+  text-rendering: auto;
 }
+a.markdown-anchor-link:before { content: '\f05c'} /*  */
 
 h1 a.markdown-anchor-link {
   top: 24px;