UI: DB: Move persistent pragma to migration.

src/ui/db/databasesql.cpp

@@ -2,7 +2,6 @@
 
 const char * const DatabaseSql::sqlPragmas =
         "PRAGMA locking_mode=EXCLUSIVE;"
-        "PRAGMA journal_mode=WAL;"
         "PRAGMA synchronous=NORMAL;"
         ;
 

src/ui/db/migrations/1.sql

@@ -1,5 +1,7 @@
 PRAGMA user_version = 1;
 
+PRAGMA journal_mode=WAL;
+
 CREATE TABLE IF NOT EXISTS app(
   app_id INTEGER PRIMARY KEY,
   path TEXT UNIQUE NOT NULL,