WIP - initial RTL support #575 (#577)

* initial RTL support

* fix dir in template-util

* fix dir in blogs new

* fix dir in blogs details

* fix dir in posts new

* fix dir in posts details

* fix dir in posts remote

* Fix dir in partials

some parts should be recheck carefully in real usage

templates/partials/image_select.rs.html

@@ -3,7 +3,7 @@
 
 @(ctx: BaseContext, id: &str, title: String, optional: bool, medias: Vec<Media>, selected: Option<i32>)
 
-<label for="@id">
+<label for="@id" dir="auto">
 	@title
 	@if optional {
 		<small>@i18n!(ctx.1, "Optional")</small>
@@ -13,7 +13,7 @@
     <option value="none" @if selected.is_none() { selected }>@i18n!(ctx.1, "None")</option>
     @for media in medias {
         @if media.category() == MediaCategory::Image {
-            <option value="@media.id" @if selected.map(|c| c == media.id).unwrap_or(false) { selected }>
+            <option value="@media.id" @if selected.map(|c| c == media.id).unwrap_or(false) { selected } dir="auto">
                 @if !media.alt_text.is_empty() {
                     @media.alt_text
                 } else {
@@ -22,4 +22,4 @@
             </option>
         }
     }
-</select>
+</select>