Add screenshot support for tasks (copy/paste images directly)

app/Template/file/screenshot.php

@@ -0,0 +1,19 @@
+<div class="page-header">
+    <h2><?= t('Add a screenshot') ?></h2>
+</div>
+
+<div id="screenshot-zone">
+    <p id="screenshot-inner"><?= t('Take a screenshot and press CTRL+V or ⌘+V to paste here.') ?></p>
+</div>
+
+<form action="<?= $this->u('file', 'screenshot', array('task_id' => $task['id'], 'project_id' => $task['project_id'], 'redirect' => $redirect)) ?>" method="post">
+    <input type="hidden" name="screenshot"/>
+    <?= $this->formCsrf() ?>
+    <div class="form-actions">
+        <input type="submit" value="<?= t('Save') ?>" class="btn btn-blue"/>
+        <?= t('or') ?>
+        <?= $this->a(t('cancel'), 'task', 'show', array('task_id' => $task['id'], 'project_id' => $task['project_id']), false, 'close-popover') ?>
+    </div>
+</form>
+
+<p class="alert alert-info"><?= t('Copy and paste images are only supported with Mozilla Firefox and Google Chrome.') ?></p>