Miscellaneous Fixes and Improvements

[zodern]

This should finish everything for v. 0.2

Changes:

• fixed error from iframe url being src="{{url}}".
• running apps have a white bar above them
• when you click on an app that is behind another app, it is moved to the top instead of being minimized
• Windows can be closed and the iframe is removed
• Text editor warns of losing changes before opening another file
• The text editor has a yellow save button, and the bottom border of the toolbar becomes yellow when the file is changed
• Created a CLI app for silk. Typing silk will start silk. -d logs more information to the console, and -r makes silk available remotely
• Improved look of task bar, close and minimize buttons. It is not possible to select text/images in Silk (you can select in apps).
• changed look of file explorer. It currently is grid view.
• fixed error from channel being created early when opening file
• Added a clock in the taskbar.