View Properties applies to the focused item without UI indication when multiple resource groups are selected

[v-amyang]

OS: Win11 x64
Build Version: 0.11.9-alpha
Regression: Not a regression

Repro Steps:

1. Open VS Code -> Go to Azure Resources view -> Select multiple Resource Groups
2. Right‑click on one of the selected Resource Groups
3. Click View Properties

Expect:
When multiple resource groups are selected, the action scope should be clear and unambiguous.
Single-resource actions such as View Properties should be disabled or hidden or clearly indicate which resource group the action will apply to.

Actual:
The Properties view opens only for the resource group that was right-clicked (focused item).
Other selected resource groups are ignored, and no UI indication explains that the action applies only to the focused item.