Bug fix

• Fix tests
• Fix bug when in empty table seelct some text and press delete, will remove whole table
• Fix backspace plugin. When after press backspace near with space + char, it removed char and this space
• Fix behavior in enter plugin. When enter was pressed inside P and cursor was in the some edge, new P was created without styles from source
• Fix bug on resize - fullsize mode
• Added logo for contributors
• For option iframeBaseUrl can be set empty string
• Added options toolbar adaptive - toolbarAdaptive https://xdsoft.net/jodit/play.html
• In iframe default styles added font-size and line-height