Changed upload error order
Fixed HTML injection
Removed redundant hash
Fixed bug with endless scrolling

It didn't work when more than one page at a time should be loaded.
Fixed pagination when no pages should be shown
Added aliases to search by uploader
Fixed edge cases in searching

- search for number (1, 2, ...)
- search for "0" (empty("0") returns true so searching for "0" was impossible)
- search containing / character
- search containing + character
- adding tags containing + character