[PS-1529]Sentence case web vault (#3577)

* updated title case to sentence case

also added grammatical improvement to confirmation messages

* capitalized 'vault'

also updated the term personal vault to individual vault

* capitalized 'send'

* capitalized 'provider'

also caught some straggling lowercase 'vaults'

* sentence case 'organizations,' 'owners', and 'admins'

* updated more casing to sentence

* lowercase vault

* Updated Premium to title case

* fixed typos

* Fixed typos and removed 'disable'

* updated two-step login terms

* Fixed missed sentence casing

* Fixed missed sentence case

* lowercased groups

fixed other missed sentence case items as well

* fixe membership casing

* uppercase plan casing

addressed other comments from Fred.

* casing on billing sync and trash

* uppercase Social Security

* fixed single sign-on casing

fixed Enterprise policy casing

* merging in master

* replaced enabled

* fixed typos

Co-authored-by: Patrick <94560851+patrick-bitwarden@users.noreply.github.com>

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