"Set Value" dialogue does not cover full range of new dB controllers

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### System Information

Windows 11 25H2

### LMMS Version(s)

1.3.0-alpha.1.926+2db75bd

### Most Recent Working Version

1.3.0-alpha.1.102+g89fc6c960

### Bug Summary

When double clicking the volume controllers recently changed to the logarithmic scale, in "Set Value", the value is clamped to [-96, 6] and does not allow the full range supported by the controller. Throughout normal 0%-200% controllers, this bug is not so apparent, but in AudioFileProcessor, the full range is (-∞, 13.98] (500% in linear scale), which is impossible to type in the dialogue.

### Expected Behaviour

The "Set Value" dialogue should clamp the min/max values according to the controller.

### Steps To Reproduce

1) Add an AudioFileProcessor instrument.
2) Set gain to 500%/13.98 dB (the controller above the waveform).
3) Double click the gain controller. The value gets clamped to 6 dB.

### Logs

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### Screenshots / Minimum Reproducible Project

_No response_

### Please search the issue tracker for existing bug reports before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Reproduce the problem with an AudioFileProcessor on Windows by setting its gain to 500%/13.98 dB and opening the Set Value dialogue. Locate the dialogue's fixed clamp and the controller range handling; done means the dialogue accepts the full range supported by each controller, including 13.98 dB for this gain control.

Written by the indexing model from the issue text.