Zero-width interval in timeline

## Expected Behavior
The ability to set the width of the interval to 0 (treating it as a closed interval) to view an instant in time

## Current Behavior
The minimum width appears to be around 1% of the duration

## Possible Solution
Is there any reason the maximum can't be dragged to ontop of the minimum to get as close to 0 as possible? Or potentially add a toggle for when you want to view instants rather than intervals of the timeline

## Steps to Reproduce

1. Open the following GEXF file:
```

```
2. Enable the timeline
3. Try and make the interval small enough that you can see that node 0 appears after node 1

## Context
I'm trying to debug a process which changes a graph over time, however viewing intervals is not helpful - the nodes before and after an instantaneous operation are shown, I want the interval to be zero-width so I can see the graph morph at each timestep.

## Your Environment

* Version used: Gephi 0.9.2 201709241107
* Java version: 1.8.0_292; OpenJDK 64-Bit Server VM 25.292-b10
* Java runtime: OpenJDK Runtime Environment 1.8.0_292-8u292-b10-0ubuntu1~20.04-b10
* Operating System: Ubuntu 20.04.2