Updated branding, email and crates

- Updated branding for admin and emails
- Updated crates and some deprications
- Removed newline-converter because this is built-in into lettre
- Updated email templates to use a shared header and footer template
- Also trigger SMTP SSL When TLS is selected without SSL
  Resolves #1641

Cargo.toml

@@ -103,16 +103,15 @@ num-derive = "0.3.3"
 
 # Email libraries
 tracing = { version = "0.1.26", features = ["log"] } # Needed to have lettre trace logging used when SMTP_DEBUG is enabled.
-lettre = { version = "0.10.0-beta.3", features = ["smtp-transport", "builder", "serde", "native-tls", "hostname", "tracing"], default-features = false }
-newline-converter = "0.2.0"
+lettre = { version = "0.10.0-beta.4", features = ["smtp-transport", "builder", "serde", "native-tls", "hostname", "tracing"], default-features = false }
 
 # Template library
-handlebars = { version = "3.5.4", features = ["dir_source"] }
+handlebars = { version = "3.5.5", features = ["dir_source"] }
 
 # For favicon extraction from main website
 html5ever = "0.25.1"
 markup5ever_rcdom = "0.1.0"
-regex = { version = "1.5.3", features = ["std", "perf"], default-features = false }
+regex = { version = "1.5.4", features = ["std", "perf"], default-features = false }
 data-url = "0.1.0"
 
 # Used by U2F, JWT and Postgres
@@ -124,10 +123,10 @@ percent-encoding = "2.1.0"
 idna = "0.2.3"
 
 # CLI argument parsing
-pico-args = "0.4.0"
+pico-args = "0.4.1"
 
 # Logging panics to logfile instead stderr only
-backtrace = "0.3.58"
+backtrace = "0.3.59"
 
 # Macro ident concatenation
 paste = "1.0.5"