Copy as cURL should fix case of verbs to uppercase

In sense I can write this and it executes fine:

put _snapshot/local-data/data
{ "indices" : "logstash-*"
}

But if I "Copy as cURL" the *_resulting statement retains the lowercase put *_which then fails to execute

curl -Xput "http://localhost:9200/_snapshot/local-kibana/kibana" -d'
> { "indices" : ".kibana"
> }'
{"error":{"root_cause":[{"type":"snapshot_missing_exception","reason":"[local-kibana:kibana] is missing"}],"type":"snapshot_missing_exception","reason":"[local-kibana:kibana] is missing","caused_by":{"type":"no_such_file_exception","reason":"/mnt/elk1/elasticsearch/snapshots/snap-kibana.dat"}},"status":404}

Would be good if the Copy as cURL could fix this, and maybe just make Sense autofix verbs to uppercase regardless as this seems to be a common cause of issues (c.f. #133 #85)

Start at the Sense “Copy as cURL” action and trace how request verbs are parsed and emitted. Check any existing tests for request formatting, then verify that lowercase verbs produce uppercase verbs in copied cURL output and that the proposed editor behavior is covered if included.