fix #7568 (#7587) (#7589)

public/css/theme-arc-green.css

@@ -209,7 +209,7 @@ a.ui.label:hover,a.ui.labels .label:hover{background-color:#505667;color:#dbdbdb
 .repository .label.list .item{border-bottom:1px dashed #4c505c}
 .ui.basic.blue.button,.ui.basic.blue.buttons .button{box-shadow:0 0 0 1px #87ab63 inset!important;color:#87ab63!important}
 .repository.file.list #file-content .code-view .hljs,.repository.file.list #file-content .code-view .lines-code ol,.repository.file.list #file-content .code-view .lines-code pre,.repository.file.list #file-content .code-view .lines-num .hljs,.repository.file.list #file-content .code-view .lines-num ol,.repository.file.list #file-content .code-view .lines-num pre{background-color:#2a2e3a}
-.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(1),.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(2),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(3),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(4),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(5),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(6){background-color:#2a2e3a}
+.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(1),.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(2),.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(3),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(4),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(5),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(6){background-color:#2a2e3a}
 .repository .diff-file-box .code-diff-split tbody tr td.add-code,.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(4),.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(5),.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(6){background-color:#283e2d!important;border-color:#314a37!important}
 .repository .diff-file-box .code-diff-split tbody tr td.del-code,.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(1),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(2),.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(3){background-color:#3c2626!important;border-color:#634343!important}
 .ui.blue.button:active,.ui.blue.buttons .button:active{background-color:#a27558}

public/less/themes/arc-green.less

@@ -1082,7 +1082,7 @@ a.ui.labels .label:hover {
 
 .repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(1),
 .repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(2),
-.repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(3),
+.repository .diff-file-box .code-diff-split tbody tr.add-code td:nth-child(3),
 .repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(4),
 .repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(5),
 .repository .diff-file-box .code-diff-split tbody tr.del-code td:nth-child(6) {