Add fixes from review plus missing images

Fixes #8063

docs/static/arcsight-module.asciidoc

@@ -108,8 +108,6 @@ dashboards.
 See <<configuring-arcsight>> if you want to specify additional options that
 control the behavior of the ArcSight module.
 
-//ALVIN: All the config information needs to be together in one place, so I've added the above link and moved the section called "Configuring the Module" so that it appears along with the config options.
-
 [[exploring-data-arcsight]]
 ==== Exploring Your Security Data
 Once the Logstash ArcSight module starts receiving events, you can immediately
@@ -194,8 +192,6 @@ prefixed with the module name, i.e. `arcsight.var.inputs` instead of `var.inputs
 All settings are optional. If you don't specify configuration settings, Logstash
 uses the defaults.
 
-//ALVIN: I don't see a good reason to have the summary table plus the reference info, so I have not included the table. It doesn't add enough value to warrant the real estate it takes up. Plus...tables don't work well when we go from docbook > PDF. If you feel strongly about having it, you can submit a separate PR, but make sure you make each setting an active link, or users will be extra annoyed by the repeated info. I've modified the intro text slightly to reflect this change.
-
 *`var.inputs`*::
 +
 --