Fixes issue with unchecked checkboxes during package installation

If one checkbox is unchecked, no further input element is evaluated since `return false;` is executed which terminates the iteration instead of (as intended) continuing the iteration with the next input element.
Fixes issue with apparently missing language item in remove report dialog
Fixed HTML syntax issue
Updating package update lists upon searching
Merge branch 'master' of github.com:WoltLab/WCF
Fixed import of previously saved options
Removed whitespaces
Fixed validation of poll option count
Updating minified JavaScript files
Fixed overflow calculation for dialog overlays
Updating minified JavaScript files
Preventing drag&drop of images
Removed debug code
Supporting "Enter" to submit forms during package installation
Preventing workers from counting the same objects over and over again
Closes dropdowns when scrolling
Updating minified JavaScript files
Fixed support for ENTER-Key
Merge branch 'master' of github.com:WoltLab/WCF
Fixes typo