(cherry picked from commit 867b0600)

(cherry picked from commit 8455fef5)

(cherry picked from commit cb08c275)

(cherry picked from commit f22f4ad0)

(captiveportal, new) add cleansing of input templates to remove all non-changed data from the user provided template.

Next stepts to implement,
	make fetch_template aware of the user templates, so the frontend fetch will return the right content.
	deploy user provided template on service reload

(cherry picked from commit e978c501)

(cherry picked from commit 52d74d1b)

(cherry picked from commit 72e0a851)

(cherry picked from commit ab6d6d0d)

(cherry picked from commit beb4c5b8)

(cherry picked from commit 1812da68)

not fully sure if we should place them in service section, they maybe moved to settings later on.

(cherry picked from commit 0ee2e3cd)

(cherry picked from commit 842943e2)

(cherry picked from commit e8e37d0c)

(cherry picked from commit 0a890241)

(cherry picked from commit 395d0d20)

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(cherry picked from commit caf43295)

(cherry picked from commit 23b3fc5c)

(cherry picked from commit b35a1ac2)

(cherry picked from commit a9b57a31)

(cherry picked from commit 7ef601b2)

PR: https://forum.opnsense.org/index.php?topic=1490.0
(cherry picked from commit bc0fe3d4)

(cherry picked from commit 0714fb3b)

(cherry picked from commit dd2aa490)

(cherry picked from commit 4a52f394)

(cherry picked from commit 87cfad6a)

(cherry picked from commit 12bcf31d)

(cherry picked from commit 64f99a60)

PR: https://forum.opnsense.org/index.php?topic=1490.0
(cherry picked from commit 811a3287)

(cherry picked from commit 481bab4c)

(cherry picked from commit d7e2c665)

(cherry picked from commit cca3be68)

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(cherry picked from commit 7716a503)

(cherry picked from commit 9cfa7a03)

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(cherry picked from commit 056eb77f)

(cherry picked from commit bcaaff09)

(cherry picked from commit fe9c87a8)

(cherry picked from commit b333523b)