Reverted SVN trunk back to revision 3938 to remove changes in default theme an a replacement of the ispconfig logo.

- Added backup size to web backups

- need to have the pecl idn and intl modules installed
  or
- have the idna_convert class in the classes/idn/ path

Fixed/Implemented: replaced intval() by $app->functions->intval() in all interface functions due to big number problem in intval()

Fixed: password match function blocked tabs incorrectly
Fixed: set focus on username input field threw an error if this field did not exist on a page

Fixed: Some templates used changeTab in a way that was not compatible with the new options to discard changes on changeTab

Moved old default theme to themes/default-304

Addes some missing translations

- Implemented: FS#1935 - Add minimum allowed seconds Value for DNS zone records

Changed the UI for the DNS SRV records to help the user (instead of giving him 1 field which have to have 3 texts, now there are 3 fields which will be concated for the database and splitted for the user).

data --> weight port target

Merged revisions 3049-3051,3053-3054,3058,3070,3074-3077,3082,3086-3088,3091-3092,3094-3095 from stable branch.