Add file attachements to projects

app/Template/project_file/create.php

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+<div class="page-header">
+    <h2><?= t('Attach a document') ?></h2>
+</div>
+<div id="file-done" style="display:none">
+    <p class="alert alert-success">
+        <?= t('All files have been uploaded successfully.') ?>
+        <?= $this->url->link(t('View uploaded files'), 'ProjectOverview', 'show', array('project_id' => $project['id'])) ?>
+    </p>
+</div>
+
+<div id="file-error-max-size" style="display:none">
+    <p class="alert alert-error">
+        <?= t('The maximum allowed file size is %sB.', $this->text->bytes($max_size)) ?>
+        <a href="#" id="file-browser"><?= t('Choose files again') ?></a>
+    </p>
+</div>
+
+<div
+    id="file-dropzone"
+    data-max-size="<?= $max_size ?>"
+    data-url="<?= $this->url->href('ProjectFile', 'save', array('project_id' => $project['id'])) ?>">
+    <div id="file-dropzone-inner">
+        <?= t('Drag and drop your files here') ?> <?= t('or') ?> <a href="#" id="file-browser"><?= t('choose files') ?></a>
+    </div>
+</div>
+
+<input type="file" name="files[]" multiple style="display:none" id="file-form-element">
+
+<div class="form-actions">
+    <input type="submit" value="<?= t('Save') ?>" class="btn btn-blue" id="file-upload-button" disabled>
+    <?= t('or') ?>
+    <?= $this->url->link(t('cancel'), 'ProjectOverview', 'show', array('project_id' => $project['id']), false, 'close-popover') ?>
+</div>

app/Template/project_file/remove.php

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+<div class="page-header">
+    <h2><?= t('Remove a file') ?></h2>
+</div>
+
+<div class="confirm">
+    <p class="alert alert-info">
+        <?= t('Do you really want to remove this file: "%s"?', $this->e($file['name'])) ?>
+    </p>
+
+    <div class="form-actions">
+        <?= $this->url->link(t('Yes'), 'ProjectFile', 'remove', array('project_id' => $project['id'], 'file_id' => $file['id']), true, 'btn btn-red') ?>
+        <?= t('or') ?>
+        <?= $this->url->link(t('cancel'), 'ProjectOverview', 'show', array('project_id' => $project['id']), false, 'close-popover') ?>
+    </div>
+</div>