Add support to save the messages into a file

[matheuswhite]

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[matheuswhite]

User inputs

• Ctrl + s: Save all history until now
• Ctrl + r: Start/stop recording

Visual Save

• Blink history block yellow on save
• Put on history a message (on plugin format using sys) to inform that history was saved

Visual Record

• Put on history a message (on plugin format using sys) to inform when the record starts and ends
• History block must be red and blinking
• Add fisheye to block name

Visual General

• Add the current file on block name
• The filename has the following format: hhmmss_ddMMyyyy.
• The datetime is count at start of program.
• If the filename already exist, then the sufix _n is added incrementing the n