6832: Should allow plotting line charts for all quantities

[aymane-harmaz]

This PR makes sure line charts cover all the events across multiple IItemIterables, and makes it possible for linear quantities to be represented as line charts on custom pages.

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Progress

• Commit message must refer to an issue
• Change must be properly reviewed (1 review required, with at least 1 Committer)

Issue

• JMC-6832: Should allow plotting line charts for all quantities (Bug - P2)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jmc.git pull/688/head:pull/688
$ git checkout pull/688

Update a local copy of the PR:
$ git checkout pull/688
$ git pull https://git.openjdk.org/jmc.git pull/688/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 688

View PR using the GUI difftool:
$ git pr show -t 688

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jmc/pull/688.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[mlbridge]

Webrevs

• 00: Full (5b5654df)