Hide config in new instances and add exceptions to log

maubot/management/frontend/src/pages/dashboard/Instance.js

@@ -149,12 +149,13 @@ class Instance extends BaseMainView {
                             value={this.selectedPluginEntry}
                             onChange={({ id }) => this.setState({ type: id })}/>
             </PrefTable>
+            {!this.isNew &&
             <AceEditor mode="yaml" theme="github" onChange={config => this.setState({ config })}
                        name="config" value={this.state.config}
                        editorProps={{
                            fontSize: "10pt",
                            $blockScrolling: true,
-                       }}/>
+                       }}/>}
             <div className="buttons">
                 {!this.isNew && (
                     <button className="delete" onClick={this.delete} disabled={this.loading}>

maubot/management/frontend/src/pages/dashboard/Log.js

@@ -16,14 +16,17 @@
 import React from "react"
 
 const Log = ({ lines, showName = true }) => <div className="log">
-    {lines.map(data =>
+    {lines.map(data => <>
         <div className="row" key={data.id}>
             <span className="time">{data.time.toLocaleTimeString()}</span>
             <span className="level">{data.levelname}</span>
             {showName && <span className="logger">{data.name}</span>}
             <span className="text">{data.msg}</span>
-        </div>,
-    )}
+        </div>
+        {data.exc_info && <div className="row exception" key={data.id + "-exc"}>
+            {data.exc_info.replace(/\\n/g, "\n")}
+        </div>}
+    </>)}
 </div>
 
 export default Log

maubot/management/frontend/src/style/pages/dashboard.sass

@@ -97,7 +97,7 @@
             overflow: auto
 
             > div.row
-                white-space: nowrap
+                white-space: pre
 
                 > span.level:before
                     content: " ["