Limit decimal precision depending on the circumstances

[VibrantTreeStump]

It should always be possible to know the order of magnitude of a given result at a glance. Currently with large numbers, this isn't possible. Steps to reproduce: Multiply 2 random large numbers.

In this example the calculator should show E26 at the right side and only show as many decimal places as can be shown on the screen without the need to scroll to the right.

[Darkempire78]

It's similar to #101

[VibrantTreeStump]

Kind of, yes, but serves a different purpose.
#101 aims at giving the user the option to change decimal precision regardless of what number is shown and how much space is available.
This could be used to cut of 2,00000001 at 2,0 even though the full number could be displayed.

My request aims at ensuring that the full context is always apparent, depending on the space available.

These 2 features should be handled separately imo.