Default color for Line
Summary
Please add a button for the default color on the Menu/Format/Line Color.
I had to expore for quite a while (#ffffff, #eeeeee,...) to revert to the default line colors I changed unwillingly. This is not so important for the Text and Background colors, as they are black an white, and also because the "Pick screen" button is usable for these cases. It would nevertheless be nice to have in case futur developments leads to Themes.
Steps to reproduce
Click on the Menu/Format/Line Color.
What is the current bug behavior?
The frame does not contains a "Default color" button, or equivalent functionality.
What is the expected correct behavior?
When clicking on this button the color would be set to #a0a0a0.
What system and libraries are you using?
Windows, Python 9, dependences recommended by pyspread, many other dependences
Relevant logs and/or screenshots
Not applicable.
Possible fixes
Not able to identify the line of code that might be responsible.