[Fix/Gui] Change the string format operation for language - name.
This prevents a possible crash while formatting the lang-name string for presentation in the audio dialog.
Merge pull request #2790 from ace20022/lang_string

[Fix/Gui] Change the string format operation for language - name.
VideoRenerers: add buffering
add buffering for GLES
WinRenderer: add buffering
DXVA: activate buffering in renderer
linuxrenderer: delete all textures on reconfigure
drop frame counter in application, ask render manager instead
vaapi: adopt to buffering in renderer
add buffering - some documentation
move NUM_BUFFERS up to BaseRenderer.h
OverlayRenderer: align buffers with index in renderManager
add buffering - submit absolute time to render buffers
RenderManager: some rework to buffering
dvdplayer: disable buffering unil dropping is improved
RenderManager: skip very late frames in render buffer
renderbuffers: drop enable/disable in this iteration
RenderManager: add method SetSpeed
RenderManager: return bufferlevel with WaitForBuffer
RenderManager: do not drop in renderbuffers, this ruins detection of displayed frame