Suggestion: adjust zoom in/out increment

[dmitrypuzyrev]

Not sure if it is resolution-dependent, but for me changes in zoom levels are too large - for example, I would like to zoom in once so that all rods are usually still seen (while "dead zones" of the upper and lower wall are out of the view), but first zoom in level is a little bit too high for that.

• I think it would be nice to decrease zoom in/out increment twice.
• Or/and we can add custom zoom level, but this might be redundant.

[a-niem]

To find a value, that is feels better for you can change the factor values in lines 916 & 918 of the eventFilter() function in mainwindow.py.

The current value was chosen arbitrarily, so feel free to make a suggestion for an improved value.