rangeTonic

Bitmaps encoded in 16 bit `unsigned short` arrays produce one garbage byte in memory per 2 pixels: > **0000**RRRR GGGGBBBB,  **0000**RRRR GGGGBBBB,  **0000**RRRR GGGGBBBB ... As an alternative, bitmaps can be stored...

This change will allow creating notification channels with spaces in their names.