Persist mail variables as plaintext without extra CSS

[rr-it]

If no mail is sent, the mail variables get persisted as tx_powermail_domain_model_mail.body instead of the mail content.
This changes the var_dump output from HTML to plaintext. Thereby no extra CSS is added anymore.

body with this change:

array(2 items)
   title => "Test" (4 chars)
   file => "2hd6u4byyozkboj27qmj3o8c4yytx6mf.svg" (36 chars)

body without this change:

<style type='text/css'>
					.extbase-debugger-tree{position:relative}
					.extbase-debugger-tree input{position:absolute !important;float: none !important;top:0;left:0;height:14px;width:14px;margin:0 !important;cursor:pointer;opacity:0;z-index:2}
					.extbase-debugger-tree input~.extbase-debug-content{display:none}
					.extbase-debugger-tree .extbase-debug-header:before{position:relative;top:3px;content:"";padding:0;line-height:10px;height:12px;width:12px;text-align:center;margin:0 3px 0 0;background-image:url(data:image/svg+xml;base64,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);display:inline-block}
					.extbase-debugger-tree input:checked~.extbase-debug-content{display:inline}
					.extbase-debugger-tree input:checked~.extbase-debug-header:before{background-image:url(data:image/svg+xml;base64,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)}
					.extbase-debugger{display:block;text-align:left;background:#2a2a2a;border:1px solid #2a2a2a;box-shadow:0 3px 0 rgba(0,0,0,.5);color:#000;margin:20px;overflow:hidden;border-radius:4px}
					.extbase-debugger-floating{position:relative;z-index:999}
					.extbase-debugger-top{background:#444;font-size:12px;font-family:monospace;color:#f1f1f1;padding:6px 15px}
					.extbase-debugger-center{padding:0 15px;margin:15px 0;background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 20px,#252525 20px,#252525 40px)}
					.extbase-debugger-center,.extbase-debugger-center .extbase-debug-string,.extbase-debugger-center a,.extbase-debugger-center p,.extbase-debugger-center pre,.extbase-debugger-center strong{font-size:12px;font-weight:400;font-family:monospace;line-height:20px;color:#f1f1f1}
					.extbase-debugger-center pre{background-color:transparent;margin:0;padding:0;border:0;word-wrap:break-word;color:#999}
					.extbase-debugger-center .extbase-debug-string{color:#ce9178;white-space:normal}
					.extbase-debugger-center .extbase-debug-type{color:#569CD6;padding-right:4px}
					.extbase-debugger-center .extbase-debug-unregistered{background-color:#dce1e8}
					.extbase-debugger-center .extbase-debug-filtered,.extbase-debugger-center .extbase-debug-proxy,.extbase-debugger-center .extbase-debug-ptype,.extbase-debugger-center .extbase-debug-visibility,.extbase-debugger-center .extbase-debug-scope{color:#fff;font-size:10px;line-height:12px;padding:2px 4px;margin-right:2px;position:relative;top:-1px}
					.extbase-debugger-center .extbase-debug-scope{background-color:#497AA2}
					.extbase-debugger-center .extbase-debug-ptype{background-color:#698747}
					.extbase-debugger-center .extbase-debug-visibility{background-color:#698747}
					.extbase-debugger-center .extbase-debug-dirty{background-color:#FFFFB6}
					.extbase-debugger-center .extbase-debug-filtered{background-color:#4F4F4F}
					.extbase-debugger-center .extbase-debug-seeabove{text-decoration:none;font-style:italic}
					.extbase-debugger-center .extbase-debug-property{color:#f1f1f1}
					.extbase-debugger-center .extbase-debug-closure{color:#9BA223;}
				</style>
				<div class="extbase-debugger extbase-debugger-inline">
				<div class="extbase-debugger-top"></div>
				<div class="extbase-debugger-center">
					<pre dir="ltr"><span><span class="extbase-debug-type">array</span>(2 items)</span >
   <span class="extbase-debug-property">title</span> => '<span class="extbase-debug-string">Test Title äöß&lt;&gt;{}</span>' (21 chars)
   <span class="extbase-debug-property">file</span> => '<span class="extbase-debug-string">2hd6u4byyozkboj27qmj3o8c4yytx6mf.svg</span>' (36 chars)</pre>
				</div>
			</div>

[mschwemer]

Thanks for your contribution.

This is already solved with commit c86e357