Update compose.html

- Deleted self-closing Syntax on a link tag (that's not allowed)
- Deleted attachmentFieldSize="40" from file tag (that's not allowed too)
Update mail.html

Deleted attachmentFieldSize="40" from file tag (that's not allowed)
Update compose.inc

Deleted size Attribute for file input
Update func.inc

deleted size attribute in file input
Update compose.html

Deleted / in wrong line
folder admin: omit fieldset if there is only one section
Fix issue where legacy config was overriden by default config (#1489288)
Merge pull request #101 from Dennis1993/patch-9

Removed not allowed syntax
Remove redundant colspan=2
Merge pull request #106 from JohnDoh/edit-folders

folder admin: omit fieldset if there is only one section
Fix iframe scrollbars on webkit browsers (#1489306)
Add release 0.9.4 milestone to changelog
Fix "PHP Warning:  Missing argument 1 for rcmail_compose_attachment_field()"