Make IED capability actions clear and compact

[masarray]

Problem

The RCB export action became effectively invisible after the IED-card primary action row changed from a horizontal StackPanel to Grid + UniformGrid. The capability behavior still searched for the old visual structure, so capability actions could disappear. Icon-only GOOSE, SMV and FILE actions were also difficult to understand without hovering.

Fix

• locate the primary IED action row through its semantic RCB action instead of the obsolete StackPanel structure;
• remove the icon-only RCB duplicate from the lifecycle row;
• keep the top row focused on Play, Stop, Edit Signals, and Save SCL;
• add a full-width compact caption row with four equal actions: GOOSE, SMV, FILE, RCB;
• route RCB to the production selected-RCB export window for the card's IED;
• preserve live capability refresh on the UI dispatcher;
• communicate available, probe-ready, and unavailable states through enablement, opacity, tooltip, border, and restrained background color;
• increase the card content minimum height so both rows remain clear and unclipped.

Validation

• source, website, license, premium UX, GOOSE, and SAS invariants passed;
• ARIEC61850 API verification passed;
• .NET restore and WPF Release build passed;
• portable x64 publish and artifact upload passed;
• final PR contains only FaultRecordUxBehavior.cs and MainWindow.RcbCapability.cs.

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