Migrate `gt-hidden` to `tw-hidden` (#30046)

We have to define this one in helpers.css because tailwind only
generates a single class but certain things rely on this being
double-class. Command ran:

```sh
perl -p -i -e 's#gt-hidden#tw-hidden#g' web_src/js/**/* templates/**/* models/**/* web_src/css/**/*

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

5 files changed, 8 insertions, 8 deletions

diff --git a/templates/repo/issue/fields/checkboxes.tmpl b/templates/repo/issue/fields/checkboxes.tmpl
index 5d98605983..531f401fb7 100644
--- a/templates/repo/issue/fields/checkboxes.tmpl
+++ b/templates/repo/issue/fields/checkboxes.tmpl
@@ -1,8 +1,8 @@
-<div class="field {{if not .item.VisibleOnForm}}gt-hidden{{end}}">
+<div class="field {{if not .item.VisibleOnForm}}tw-hidden{{end}}">
 	{{template "repo/issue/fields/header" .}}
 	{{range $i, $opt := .item.Attributes.options}}
 		<div class="field inline">
-			<div class="ui checkbox tw-mr-0 {{if and ($opt.visible) (not (SliceUtils.Contains $opt.visible "form"))}}gt-hidden{{end}}">
+			<div class="ui checkbox tw-mr-0 {{if and ($opt.visible) (not (SliceUtils.Contains $opt.visible "form"))}}tw-hidden{{end}}">
 				<input type="checkbox" name="form-field-{{$.item.ID}}-{{$i}}" {{if $opt.required}}required{{end}}>
 				<label>{{RenderMarkdownToHtml $.context $opt.label}}</label>
 			</div>
diff --git a/templates/repo/issue/fields/dropdown.tmpl b/templates/repo/issue/fields/dropdown.tmpl
index b8df6908e3..f4fa79738c 100644
--- a/templates/repo/issue/fields/dropdown.tmpl
+++ b/templates/repo/issue/fields/dropdown.tmpl
@@ -1,4 +1,4 @@
-<div class="field {{if not .item.VisibleOnForm}}gt-hidden{{end}}">
+<div class="field {{if not .item.VisibleOnForm}}tw-hidden{{end}}">
 	{{template "repo/issue/fields/header" .}}
 	{{/* FIXME: required validation */}}
 	<div class="ui fluid selection dropdown {{if .item.Attributes.multiple}}multiple clearable{{end}}">
diff --git a/templates/repo/issue/fields/input.tmpl b/templates/repo/issue/fields/input.tmpl
index ad0fe3d783..039f9a9f34 100644
--- a/templates/repo/issue/fields/input.tmpl
+++ b/templates/repo/issue/fields/input.tmpl
@@ -1,4 +1,4 @@
-<div class="field {{if not .item.VisibleOnForm}}gt-hidden{{end}}">
+<div class="field {{if not .item.VisibleOnForm}}tw-hidden{{end}}">
 	{{template "repo/issue/fields/header" .}}
 	<input type="{{if .item.Validations.is_number}}number{{else}}text{{end}}" name="form-field-{{.item.ID}}" placeholder="{{.item.Attributes.placeholder}}" value="{{.item.Attributes.value}}" {{if .item.Validations.required}}required{{end}} {{if .item.Validations.regex}}pattern="{{.item.Validations.regex}}" title="{{.item.Validations.regex}}"{{end}}>
 </div>
diff --git a/templates/repo/issue/fields/markdown.tmpl b/templates/repo/issue/fields/markdown.tmpl
index 97813cc1d8..934699ed05 100644
--- a/templates/repo/issue/fields/markdown.tmpl
+++ b/templates/repo/issue/fields/markdown.tmpl
@@ -1,3 +1,3 @@
-<div class="field {{if not .item.VisibleOnForm}}gt-hidden{{end}}">
+<div class="field {{if not .item.VisibleOnForm}}tw-hidden{{end}}">
 	<div>{{RenderMarkdownToHtml .Context .item.Attributes.value}}</div>
 </div>
diff --git a/templates/repo/issue/fields/textarea.tmpl b/templates/repo/issue/fields/textarea.tmpl
index 831cea01d5..3ad69e1220 100644
--- a/templates/repo/issue/fields/textarea.tmpl
+++ b/templates/repo/issue/fields/textarea.tmpl
@@ -1,5 +1,5 @@
 {{$useMarkdownEditor := not .item.Attributes.render}}
-<div class="field {{if not .item.VisibleOnForm}}gt-hidden{{end}} {{if $useMarkdownEditor}}combo-editor-dropzone{{end}}">
+<div class="field {{if not .item.VisibleOnForm}}tw-hidden{{end}} {{if $useMarkdownEditor}}combo-editor-dropzone{{end}}">
 	{{template "repo/issue/fields/header" .}}
 
 	{{/* the real form element to provide the value */}}
@@ -7,7 +7,7 @@
 
 	{{if $useMarkdownEditor}}
 		{{template "shared/combomarkdowneditor" (dict
-			"ContainerClasses" "gt-hidden"
+			"ContainerClasses" "tw-hidden"
 			"MarkdownPreviewUrl" (print .root.RepoLink "/markup")
 			"MarkdownPreviewContext" .root.RepoLink
 			"TextareaContent" .item.Attributes.value
@@ -16,7 +16,7 @@
 		)}}
 
 		{{if .root.IsAttachmentEnabled}}
-		<div class="tw-mt-4 form-field-dropzone gt-hidden">
+		<div class="tw-mt-4 form-field-dropzone tw-hidden">
 			{{template "repo/upload" .root}}
 		</div>
 		{{end}}