WebResourceHelper: Issues with cross-solution web resources

[dhedey]

The support when a web resource can be in multiple solutions is flakey. In particular, there is the following issue:

The helper attempts to add what is thinks is a new web resource, but it actually already exists on the system, just not in the current solution. This causes an error at upload time.

This is caused by the helper only loading the list of web resources in the current solution, when in reality, it needs to know all the web resources in the organization to know whether to create, update or do nothing.