Fix #5809: Data-tier wizard "Source Server" shouldn't show database name (#6125)

* Removing database name from server connection and adding required asterisk to database dropdowns

* also remove database name in flat file import wizard

extensions/import/src/wizard/api/basePage.ts

@@ -64,19 +64,14 @@ export abstract class BasePage {
 				}
 			}
 
-			let db = c.options.databaseDisplayName;
 			let usr = c.options.user;
 			let srv = c.options.server;
 
-			if (!db) {
-				db = '<default>';
-			}
-
 			if (!usr) {
 				usr = 'default';
 			}
 
-			let finalName = `${srv}, ${db} (${usr})`;
+			let finalName = `${srv} (${usr})`;
 			return {
 				connection: c,
 				displayName: finalName,