Advanced saving/loading

[toomeyDev]

Current save function only saves a .txt record of the total calculated time from a particular timesheet, would improve usability to be able to load all previously entered values (ie 5 hours, 15 minutes, 30 seconds etc) for rows back into the program to continue editing a timesheet.

Will need to save state of individual entry widgets from each row, then use this information to re-create the same number of rows with the same values in a new timesheet instance.

• [ ] Implement simple loading (open total hours from a txt file and add a single row with same number of hrs, minutes, seconds)
• [ ] Implement advanced save functionality (save state of each row and entry widget within the time recording area)
• [ ] Implement advanced load functionality (recreate state of various entries from saved file so user can continue editing a previous timesheet)

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[toomeyDev]

2787e26d8220f36cfe8d1382cb2603948822c8f3 Implement simple loading, timesheets can now be saved and loaded as .txt files.