PLT-3633 EE: Add Google and Office365 SSO through OAuth2 (#3660)

* EE: Add Google and Office365 SSO through OAuth2

* Add localization strings

* Text tweaks for PLT-3633

* Added sign-up button for Office 365

* Updated some error messages and a bit of licensing

* Updated sign-in method section in user settings to include Google and Office365

* Added more localization strings

model/license.go

@@ -36,6 +36,7 @@ type Features struct {
 	LDAP                 *bool `json:"ldap"`
 	MFA                  *bool `json:"mfa"`
 	GoogleSSO            *bool `json:"google_sso"`
+	Office365SSO         *bool `json:"office365_sso"`
 	Compliance           *bool `json:"compliance"`
 	CustomBrand          *bool `json:"custom_brand"`
 	MHPNS                *bool `json:"mhpns"`
@@ -67,7 +68,12 @@ func (f *Features) SetDefaults() {
 
 	if f.GoogleSSO == nil {
 		f.GoogleSSO = new(bool)
-		*f.GoogleSSO = *f.FutureFeatures
+		*f.GoogleSSO = true
+	}
+
+	if f.Office365SSO == nil {
+		f.Office365SSO = new(bool)
+		*f.Office365SSO = true
 	}
 
 	if f.Compliance == nil {