User requests and fixes.

• Handle case when an audio record was removed outside of the app.
• Stop recording when running out of space
• A deleted record will be moved into the trash directory
• Fixed memory leak
• Sound, light, vibrate alarm when 'no space' notification
• Animate waveform to start when stop playback
• Updated draw waveform algorithm
• UI fixes
• Added ability to pause records on devices with Android 7 or higher
• Added Blue-grey theme
• Fixed bug when couldn't delete record ib record list
• Fixed error when delete active record, records list was not shown
• Added setting which allows selecting default record name format
• Show blue theme when the first app start
• Fixed few errors and crashes