6780661192
* Fix layout of the topic edit. - made right-hand column wider so that it has enough space for "Done" button. - fixed issue that jQuery's .show() breaks functionality of the Semantic UI Grid. * Improve switching visibility of the topic edit Changes to support old browsers that doesn't support 'flex' keyword. - Removed style "display: none" from index.css so that the grid can be displayed without specifying new "display" style. - Added style "display:none" to the grid element in HTML template as the initial style. - In index.js, visibility of the grid element is changed by set "display:none" style to the element or removing it from the element.