Electronによる掲示板ビューア Siki Part38

>>263
component/contextmenu.jsを下で上書きすればフィルタのメニューが追加されます
```
{
"__version": "0.28.3",
'.res-col': [
{ menu_set: 'thread-rescol', accelerator: 'p' },
{ command: 'clipboard:copy', accelerator: 'c', prop_params: ['copytext'], label: 'コピー' },
{ command: 'sidepanel:search.setword', accelerator: 's' },
{ menu_set: 'thread-resmark', accelerator: 'm' },
{ command: 'filter:set.pp', accelerator: 'f' },
{ type: 'separator' },
{ menu_set: 'attach', ap: 'id' },
{ command: 'mark:set.mute', accelerator: 'n', prop_params: ['tabid', 'colkey'] }
],
}
```