Also fixing description output.

- Configuration
- Editing modes
- Insertion modes
- Known Problems And Hints
- Manage Backups
- Search Constant
- View Tree

Not using first person.

- Introduction
- General
- Edit file
- Edit constant
- Add constant
- Delete constant
- Rename constant

- $_SESSION[$sessID] => $this->session

Executing backup in override mode is useless because backup menu item is disabled in override mode.

How it works now:
If file exists (e.g. de.locallang) in both, l10n and extension folder, if in l10n mode, l10n/../de.locallang is transformed, and EXT:/.../de.locallang is not transformed. Default language file is also transformed in this example.

- Fixes XML files being deleted by backup restore.
- Fixes diff view of xlf files (removes '@attributes' and 'trans-unit')
- Prevents empty 'attributes' tag in restored XLF file.

Feature override

Feature override merge into master

See merge request !3

Changing '[]' to 'array()'

[BUGFIX] German and other languages that are not inside the reverse mapping array are not shown anymore

And he can not delete/add/rename constants. He can only edit languages for which he has permission.

LFE uses new ISO language codes, and sys_language table uses old TYPO3 codes.

Adding <lfe:inlineLanguageLabels labels="..." /> to default layout cosed some table css rules to be overwritten.

Typo3 can read XML override non-default translations.

Problem with handling root label translation is fixed.