Manage project page, safe copy from/to forms

In manage project edit page, make the forms in each section for copying
items to/from other projects to not have an initial project as selected,
and make the selection as required.
This avoid to accidentally use this actions, without having made an
explicit selection in them.

Fixes: #25368

manage_proj_edit_page.php

@@ -390,7 +390,8 @@
 		<fieldset>
 			<?php echo form_security_field( 'manage_proj_cat_copy' ) ?>
 			<input type="hidden" name="project_id" value="<?php echo $f_project_id ?>" />
-			<select name="other_project_id" class="input-sm">
+			<select name="other_project_id" class="input-sm" required>
+				<option selected disabled value=""><?php echo '[', lang_get( 'select_project_button' ), ']' ?></option>
 				<?php print_project_option_list( null, false, $f_project_id ); ?>
 			</select>
 			<input type="submit" name="copy_from" class="btn btn-sm btn-primary btn-white btn-round" value="<?php echo lang_get( 'copy_categories_from' ) ?>" />
@@ -479,7 +480,8 @@
 		<fieldset>
 			<?php echo form_security_field( 'manage_proj_ver_copy' ) ?>
 			<input type="hidden" class="form-control input-sm" name="project_id" value="<?php echo $f_project_id ?>" />
-			<select name="other_project_id" class="input-sm">
+			<select name="other_project_id" class="input-sm" required>
+				<option selected disabled value=""><?php echo '[', lang_get( 'select_project_button' ), ']' ?></option>
 				<?php print_project_option_list( null, false, $f_project_id ); ?>
 			</select>
 			<input type="submit" name="copy_from" class="btn btn-sm btn-primary btn-white btn-round" value="<?php echo lang_get( 'copy_versions_from' ) ?>" />
@@ -585,7 +587,8 @@
 		<fieldset>
 			<?php echo form_security_field( 'manage_proj_custom_field_copy' ) ?>
 			<input type="hidden" name="project_id" value="<?php echo $f_project_id ?>" />
-			<select name="other_project_id" class="input-sm">
+			<select name="other_project_id" class="input-sm" required>
+				<option selected disabled value=""><?php echo '[', lang_get( 'select_project_button' ), ']' ?></option>
 				<?php print_project_option_list( null, false, $f_project_id ); ?>
 			</select>
 			<input type="submit" name="copy_from" class="btn btn-sm btn-primary btn-white btn-round" value="<?php echo lang_get( 'copy_from' ) ?>" />
@@ -705,7 +708,8 @@
 						<fieldset>
 							<?php echo form_security_field( 'manage_proj_user_copy' ) ?>
 							<input type="hidden" name="project_id" value="<?php echo $f_project_id ?>" />
-							<select name="other_project_id" class="input-sm">
+							<select name="other_project_id" class="input-sm" required>
+								<option selected disabled value=""><?php echo '[', lang_get( 'select_project_button' ), ']' ?></option>
 								<?php print_project_option_list( null, false, $f_project_id ); ?>
 							</select>
 							<span class=form-inline">
@@ -743,9 +747,9 @@
 							<label><?php echo lang_get( 'show' ) ?>
 							<input id="input-per-page" type="text" min="5" size="2" class="input-sm" value="<?php echo config_get( 'default_limit_view' ) ?>"/>
 							</label>
-							<span>
+							<label>
 								&nbsp;(<?php echo lang_get( 'total' ), ': ', $t_users_count, ' ', lang_get( 'users_link' ) ?>)
-							</span>
+							</label>
 						</div>
 						<div class="btn-group pull-right">
 							<ul class="pagination small no-margin"></ul>