feat(list): support change default action by configuration

doc/coc.txt

@@ -2847,20 +2847,29 @@ list.
 For configuration of a specified list, use section that starts with:
 `list.source.{name}`, where `{name}` is the name of list.
 
-Configure default options:~
+Change default action:~
+
+If you want to use `tabe` as default action of symbols list, you can use:
+>
+	// change default action of symbols
+	"list.source.symbols.defaultAction": "tabe"
+<
+in your coc-settings.json
+
+Change default options:~
 
 Use `list.source.{name}.defaultOptions` setting like: >
 
 	// make symbols list use normal mode and interactive by default
 	"list.source.symbols.defaultOptions": ["--interactive", "--number-select"],
 <
 Note: some list like symbols only work in interactive mode, you must
-include `--interactive` to `defaultOptions`.
+include `--interactive` in `defaultOptions`.
 
 Note: default options will not be used when there're options passed
 with |:CocList| command.
 
-Config default arguments:~
+Change default arguments:~
 
 Use `list.source.{name}.defaultArgs` setting like: >
 

src/list/manager.ts

@@ -394,6 +394,16 @@ export class ListManager implements Disposable {
       window.showMessage(`list "${name}" recreated.`)
     }
     this.listMap.set(name, list)
+    let config = workspace.getConfiguration(`list.source.${name}`)
+    let defaultAction = config.get<string>('defaultAction')
+    if (defaultAction && list.actions.find(o => o.name == defaultAction)) {
+      list.defaultAction = defaultAction
+    }
+    extensions.addSchemeProperty(`list.source.${name}.defaultAction`, {
+      type: 'string',
+      default: null,
+      description: `Default default action of "${name}" list.`
+    })
     extensions.addSchemeProperty(`list.source.${name}.defaultOptions`, {
       type: 'array',
       default: list.interactive ? ['--interactive'] : [],