First version of new ui based on tailwind

This drops fomantic-ui as css toolkit and introduces tailwindcss. With
tailwind there are no predefined components, but it's very easy to
create those. So customizing the look&feel is much simpler, most of
the time no additional css is needed.

This requires a complete rewrite of the markup + styles. Luckily all
logic can be kept as is. The now old ui is not removed, it is still
available by using a request header `Docspell-Ui` with a value of `1`
for the old ui and `2` for the new ui.

Another addition is "dev mode", where docspell serves assets with a
no-cache header, to disable browser caching. This makes developing a
lot easier.

modules/webapp/src/main/elm/Comp/EmailSettingsTable.elm

@@ -5,12 +5,15 @@ module Comp.EmailSettingsTable exposing
     , init
     , update
     , view
+    , view2
     )
 
 import Api.Model.EmailSettings exposing (EmailSettings)
+import Comp.Basic as B
 import Html exposing (..)
 import Html.Attributes exposing (..)
 import Html.Events exposing (onClick)
+import Styles as S
 
 
 type alias Model =
@@ -42,6 +45,10 @@ update msg model =
             ( { model | selected = Just ems }, Cmd.none )
 
 
+
+--- View
+
+
 view : Model -> Html Msg
 view model =
     table [ class "ui selectable pointer table" ]
@@ -76,3 +83,45 @@ renderLine model ems =
         , td [] [ text hostport ]
         , td [] [ text ems.from ]
         ]
+
+
+
+--- View2
+
+
+view2 : Model -> Html Msg
+view2 model =
+    table [ class S.tableMain ]
+        [ thead []
+            [ tr []
+                [ th [ class "" ] []
+                , th [ class "text-left mr-2" ] [ text "Name" ]
+                , th [ class "text-left mr-2" ] [ text "Host/Port" ]
+                , th [ class "text-left mr-2 hidden sm:table-cell" ] [ text "From" ]
+                ]
+            ]
+        , tbody []
+            (List.map (renderLine2 model) model.emailSettings)
+        ]
+
+
+renderLine2 : Model -> EmailSettings -> Html Msg
+renderLine2 _ ems =
+    let
+        hostport =
+            case ems.smtpPort of
+                Just p ->
+                    ems.smtpHost ++ ":" ++ String.fromInt p
+
+                Nothing ->
+                    ems.smtpHost
+    in
+    tr
+        [ class S.tableRow ]
+        [ B.editLinkTableCell (Select ems)
+        , td [ class "text-left mr-2" ]
+            [ text ems.name
+            ]
+        , td [ class "text-left mr-2" ] [ text hostport ]
+        , td [ class "text-left" ] [ text ems.from ]
+        ]