fix sidebar_stack pop to []
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@@ -56,6 +56,7 @@ class App extends Component {
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ns.splice(1,1);
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ns.splice(1,1);
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ns=ns.concat([[title,content]]);
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ns=ns.concat([[title,content]]);
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} else if(mode==='pop') {
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} else if(mode==='pop') {
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if(ns.length===1) return;
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ns.pop();
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ns.pop();
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} else if(mode==='replace') {
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} else if(mode==='replace') {
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ns.pop();
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ns.pop();
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