fix(SwitcherSettings):load schema list when default.custom.yaml is absent (#1126)

SwitcherSettings::Load returns false if the patch file is absent; it should keep loading the schema list.
user code should handle the case when there is no custom setting.

Author: fxliang

src/rime/lever/custom_settings.cc

@@ -37,10 +37,12 @@ bool CustomSettings::Load() {
   }
   path custom_config_path =
       deployer_->user_data_dir / custom_config_file(config_id_);
+  modified_ = false;
   if (!custom_config_.LoadFromFile(custom_config_path)) {
+    LOG(WARNING) << "cannot find '" << config_id_ << ".custom.yaml'"
+                 << " in " << custom_config_path;
     return false;
   }
-  modified_ = false;
   return true;
 }
 

src/rime/lever/switcher_settings.cc

@@ -19,16 +19,15 @@ SwitcherSettings::SwitcherSettings(Deployer* deployer)
     : CustomSettings(deployer, "default", "Rime::SwitcherSettings") {}
 
 bool SwitcherSettings::Load() {
-  if (!CustomSettings::Load())
-    return false;
+  auto ret = CustomSettings::Load();
   available_.clear();
   selection_.clear();
   hotkeys_.clear();
   GetAvailableSchemasFromDirectory(deployer_->shared_data_dir);
   GetAvailableSchemasFromDirectory(deployer_->user_data_dir);
   GetSelectedSchemasFromConfig();
   GetHotkeysFromConfig();
-  return true;
+  return ret;
 }
 
 bool SwitcherSettings::Select(Selection selection) {