Previously, a NotAllowedException would be thrown if an invalid session
was encountered. However, these exceptions were not caught, and hence
would yield a fatal uncaught exception error.
At this point in Kabuki, the ErrorHandler class has not been registered yet
for error handling purposes. This error is therefore not visible if the PHP
ini directive 'display_errors' is set to 'Off'. As this is the default
production value, the script would fail with a blank page in such cases.
To create inline thumbnails locally, the previous version of the photo uploader
used base64 representations of the local files to be uploaded. While this is
effective, it is a little wasteful. When uploading several photos at once, this
could even lead to the page becoming less responsive.
This commit changes the process such that the photos are actually resized on a
canvas, only using the local original as a buffer. Hence, only the resized
photo is retained in memory.
The ConfirmDelete page now uses parts of the photopage. The
Confirmation dialog is its own template which is based on Alert.
The database now updates the album thumb to the most recent
addition to the album, when the album thumb asset is being deleted.
When there are no pictures left in the album 0 will be set.
