fix(patientrepository.ts): clean search string of special chars

Removed special chars that interfered with RegExp in search strings

re HospitalRun#1999

src/clients/db/PatientRepository.ts

@@ -13,7 +13,7 @@ export class PatientRepository extends Repository<Patient> {
   }
 
   async search(text: string): Promise<Patient[]> {
-    const cleanText = text.replace(/\\[^a-zA-Z ]/g, '')
+    const cleanText = text.replace(/[\\[()?*]+/g, '')
     return super.search({
       selector: {
         $or: [