Added new Tableview widget and tableview module

[israel-dryer]

The new tableview module includes the new Tableview class and several other related classes.

This is a wrapper on the Treeview widget with built-in functionality such a searching, sorting, and various other functions available via right-click menus on the header and cells.

Data can be loaded via the widget constructor or with insert_row and insert_column methods.

I've added methods to autoalign and autofit the columns to the data.

[antrrax]

I did some tests (Linux Mint x64 Cinnamon X11), some suggestions for change:

Sorting image was cut off when doing autofit_columns. I changed
pad = utility.scale_size(self, 10)

for this and fixed the problem:
pad = utility.scale_size(self, 20)

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Changed menu post method to tk_popup, several lines. Thus, the dropdown menu is displayed when hovering over the parent.
And mainly the menu is closed when clicking anywhere on the screen outside of it

example:
def post(self, event):

to: (in every 'post' to tk_popup)
def tk_popup(self, event):

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I also changed the way to write csv.

writer = csv.writer(f)

for

CSV_DELIMITER = ';'
CSV_QUOTECHAR = '"'
writer = csv.writer(f, delimiter=CSV_DELIMITER, quotechar=CSV_QUOTECHAR, quoting=csv.QUOTE_NONNUMERIC)

Because depending on the country's local currency, using ',' as a delimiter can cause csv conflicts
ex: In Brazil the float separator is ',' and not '.'

bugs:
https://www.mediafire.com/file/0oil09c4i9vcif6/bug_tableview.mp4/file

modified:
https://www.mediafire.com/file/50e4b5qog148l9u/modified_tableview.mp4/file

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There is also a bug with 'hide select rows'.
After applying this filter and trying to clean. It does not return the hidden line.
https://www.mediafire.com/file/hyhakz2oyi8lmd3/bug_hide.mp4/file

Another problem if the user hides all the rows there is no way for him to reload the data. It would be nice to have a reload/refresh data button as suggested before

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A complement.

The header separator could be in a different color than the header. For the program user, it is difficult to identify where this separator to double-click

See the image. When the program is loaded. The separator is in an unexpected position for the user to find. If the separator were a line with a different color from the header, it would be easier to find.