bug(CdkVirtualScrollViewport/CdkVirtualForOf): measureRangeSize ignores margins

[StenCalDabran]

measureRangeSize in CdkVirtualForOf uses the Elements getBoundingClientRect method to measure width or height of the DOM elements in the range. Unfortunately, this method ignores margins...
The method measureRangeSize in the CdkVirtualScrollViewport uses the one from CdkVirtualForOf and therefore has the same problem.

Expected Behavior

measureRangeSize should measure the total combined size of the elements in the given range.

Actual Behavior

Margins are ignored, leading to the method not actually returning the size of the complete range but rather the sum of sizes of all its element without the margins that may be between them.

Environment

• Angular: 7.x - current (at least 10.0.1)
• CDK/Material: 7.x - current (at least 10.0.1)
• Browser(s): should be all
• Operating System (e.g. Windows, macOS, Ubuntu): all

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}