feat(database): global data sources listed in every project (#1407)

Data sources can be made global (Global option in their properties): stored in data-sources.toml of the app data directory, listed in every project, with their saved passwords under an app-wide key that moves along when the scope changes. Fixes #1252

src/platform/locales/text/zh.json

@@ -4242,6 +4242,8 @@
   "Root markers": "根标记",
   "Initialization options": "初始化选项",
   "Global": "全局",
+  "global": "全局",
+  "Available in all projects": "在所有项目中可用",
   "This project": "此项目",
   "Executable name or path": "可执行文件名或路径",
   "Select the server executable": "选择服务器可执行文件",