Nils Schneider Updates GPU Impulse Reverb

New features are the support of the FLAC file format for impulse responses. Additionally, a tooltip for the GPU usage meter now displays more information and some issues were resolved.

Changes:

• IMP: Added support for the FLAC audio format to load IRs.
• IMP: GPU usage meter now has a tooltip with more details, it reports PCIe bandwidth usage as well as computation performance.
• FIX: Fixed a possible hang if the blocksize was changed.
• FIX: Waveform display could show incorrect values.
• FIX: “High Latency” parameter was not restored correctly in a production environment.