Allow 10µl as max volume in Create pooled libraries wizard

[Nicklas Nordborg]

The current limit is between 2 and 5µl. The 5µl limit was chosen to avoid complicated error checking and calculations for speedvac:ed libraries that only has 5µl left to begin with. However, this was fixed in #527 which had to consider the case that the remaining volume was too low even though the concentration is high enough.

The reason for allowing a higher value is that a recent library plate got really high concentrations and almost all libraries needed to the mixed to double volume. Lot of works which could have been avoided if making a larger pool to begin with.

The same change should be applied to the manual pooling wizard.

[Nicklas Nordborg]

(In [2150]) Fixes #537: Allow 10µl as max volume in Create pooled libraries wizard