add possibility to edit sampled audio

[DrCopyPaste]

maybe allow cutting it at beginning and end and save as new file or override it (maybe even in between)

• add option to open just recorded file in "edit mode"
• if (auto replay is enabled, replay will start in this new "edit window")
• the edit window allows to cut the sample (only at beginning and end?)
• one can exit the edit window in a "save as" kind of way to allow custom file naming
  (this could be preferrable to file prompt mode (see below) but maybe not, in the case that one wants - to name the file in advance, before recording)
• edit window could in principle also allow other audio options like volumne control or pitching