updated css style for project notifications (notifications are now visible even if the page is scrolled down) + added notification for save file events
clickable collapsible panel header + additional feedback for collapsed panels
[Emulink] codemirror is now used in rename dialog windows + [ModelEditor] improved search functionality
patch for search function in Model Editor (the function can now be activated either with ctrl+s or by clicking on the search input field)
additional fix for issue #166
updated css to prevent selection of UI elements on doubleclick events
updated code for click events of collapsible panel header to improve cross-browser compatibility
improved behaviour of search function in model editor
Filter files returned in list of subfiles using the standard filters used throughout the library
Merge commit '4718e6a002e4a6a423d73cb539f9cead4a06f941' into alpha

* commit '4718e6a002e4a6a423d73cb539f9cead4a06f941':
  improved behaviour of search function in model editor
  updated code for click events of collapsible panel header to improve cross-browser compatibility
  updated css to prevent selection of UI elements on doubleclick events
  additional fix for issue #166
  patch for search function in Model Editor (the function can now be activated either with ctrl+s or by clicking on the search input field)
  [Emulink] codemirror is now used in rename dialog windows + [ModelEditor] improved search functionality
  clickable collapsible panel header + additional feedback for collapsed panels
  updated css style for project notifications (notifications are now visible even if the page is scrolled down) + added notification for save file events