Okay, all the new buttons for all the themes for Mask tool are in compressed file added.
Unfortunately the buttons for Blond-cv and Blue-dot themes are really ugly, sorry; at the beginning I was reworking these buttons but then I wondered myself “how many user use these themes?”, “Does it make sense to waste time making buttons that nobody uses?”. If You think different I will rework those buttons for Blond-cv and Blue-dot themes.
>> MaskTool_point-prst-pstn-scale_btns.tar.gz

I noticed that for the Enable (Show/Hide) button is used the Reset button. I think it should be another type of icon to distinguish features. I have done a few of demo buttons and I show you in the animated GIF. (Sorry GG another button, sigh-sigh. Sometimes I prefer the Generic button with the text inside because it is more flexible also from coder’s point of view, I think).
>> MaskTool_ShowHidebtn_demo_201900716.gif

My doubt/consideration about Presets Shapes:
Now, with the 4 icons for each shape, when you press the its button, the mask is drawn immediately and it overwrite, if any, the previous mask. At the beginning, with the three Generic button Load-Save-Del, before overwriting the previous mask, you had to open its menu, to choose the shape in the list and then click on it. More clicks but you had time to cancel.
What do you think about, please?

@Sam
Sorry Sam, when I saw your last photomontage I tried to login in MantisBT but at that time it didn’t work, and then I have done a full immersion in buttons, that I dream even when I sleep. ;-p

Thank you!

IgorBeg
(the buttons have been tested in Cin version: “cinelerra-5.1-ub16-x86_64-static_20190711-testing”)