UGS bug when Reading Column Weights from Config Files

This was reported on EPS in 5.5, but the code is still the same in 5.6:

UGS incorrectly reads the "Weight" setting from its ConfigObject for its column headers in UpdateColumnSettings() in \Engine\Source\Programs\UnrealGameSync\UnrealGameSync\Controls\WorkspaceControl.cs

The two issues are:

1. The column weight is a float, but ConfigObject has no floating point overload for its GetValue() functions. As a result, its reading the column weight as an integer.
2. The default value for the read is "minColumnWidths[column.Index]", but that should most likely be "columnWeights[column.Index]".