Add category order (#2592)

* Add category order

Each category has a new 'priority' attribute. It is used to sort categories in
views. Categories with the same priority are sorted alphabetically. Categories
with no priority are displayed after those with one.

For example, if we have the following categories:
- A (priority: 2)
- B (no priority)
- C (priority: 1)
- D (priority: 2)
- E (no priority)
- F (priority: 1)

They will be displayed in the following order:
- C
- F
- A
- D
- B
- E

See #190

* Shorten help text

It took too much room and will not be so necessary once we have drag &
drop

1 files changed, 7 insertions, 0 deletions

diff --git a/app/views/helpers/category/update.phtml b/app/views/helpers/category/update.phtml
index 6a4c041ba..9e55e613d 100644
--- a/app/views/helpers/category/update.phtml
+++ b/app/views/helpers/category/update.phtml
@@ -17,6 +17,13 @@
 				?> />
 			</div>
 		</div>
+		<div class="form-group">
+			<label class="group-name" for="position"><?= _t('sub.category.position') ?></label>
+			<div class="group-controls">
+				<input type="number" name="position" id="position" min="1" value="<?= $this->category->attributes('position') ?>" />
+				<?= _i('help') ?> <?= _t('sub.category.position_help') ?>
+			</div>
+		</div>
 
 		<div class="form-group form-actions">
 			<div class="group-controls">