Benchmark tests

[saberraz]

It would be good to set up some tests for benchmarking the app performance. Currently, there are many sources which can introduce regression. I suggest to set up some basic tests to:

• App loading with no projects
• App loading with default projects
• Map rendering (we need different scenarios for that, e.g. online/offline, with/without OTF projection (+/- custom grid shifts)
• Forms and relations
• Downloading/syncing project

[tomasMizera]

Regarding the forms, look especially at opening/loading of them