Description of problem:
While apparently not strictly needed for running fritzing, not having the qt-plugin for sqlite installed causes fritzing to complain about it in terminal (lots of

QSqlQuery::prepare: database not open

lines)

How reproducible:
100%

Steps to Reproduce:
0. don't install/remove qt5-database-plugin-sqlite
1. cd /usr/share/fritzing/parts/ , launch fritzing (see bug#24114 )
2. see it complain about "QSqlDatabase: QSQLITE driver not loaded" and complain about "database not open" many times
3. close fritzing, install qt5-database-plugin-sqlite and do the same thing again
 → now no complaints to terminal, and it seems it uses sqlite to build a cache of the parts, so switching between different sets is faster (but that could also be side-effect of disk-cache, didn't bother to do proper benchmark)