Splash screen, parent keyword, undo, redo and paste

Changelog

After many months I can finally release a new version. I'm really sorry for the delay but I'm currently working full time on my bachelor's thesis so I don't have much free time to work on ImHex right now. Hopefully in a few weeks again though :)

Additions

• Added a new and super fancy splash screen!
  • All resource loading will now be done while this screen is shown
• Added German localization. Thanks a lot to @tumGER for proof reading!
• Added Italian localization. Thanks a lot to @CrustySean!
• Updated ImHex icon with a new one
• Added FPS limiting
  • ImHex is now less power hungry and lowers its FPS to 5 when the window loses focus
• Added Paste, Undo and Redo function!
  • This has LONG been overdue
• Added saving and loading of data processor setups
• Added data size node to the data processor
• Added ability to copy values from the data inspector
• Data overlays now work everywhere
  • This means if the data processor changed the displayed data, this data will also show up in the pattern data view, inspector, analyzer, disassembler and every where else
• Added parent keyword to the pattern language
  • This allows you to access variables that are found in the parent of the current structure
• Added array index syntax to r-values in the pattern language
  • This also turned the addressof and sizeof built-in function into operators now so they no longer require ""
• Added UTF-16 character type and strings to the pattern language
• Allow nested use of types in the pattern language
• Added dataSize() function to the pattern language to get the currently loaded data size
• Added base_address pragma to the pattern language to automatically set the file's base address
• Loaded plugins are now displayed on the welcome screen
• Added slider to entropy graph to quickly skip through the file
• Added Recent Files to File menu
• Added ability to lock bookmarks so they can't be edited anymore until unlocked
• Added Font Awesome icons in a few places
• Use correct folder paths on Mac and Linux instead of looking for everything next to the executable
  • Check the README to know where things are supposed to go now!
• Added memory usage footer item on Windows
• Added buffer combine, slice and repeat nodes to the data processor
• Added currently loaded file name to the window title
• Added Close File option to the File Menu
• Added hex editor color highlighting opacity setting

Improvements

• Pattern language execution, disassembling, searching and many other things that may take a long time to complete are now run asynchronously
• Properly open some default views on first launch
• Greatly improved the Data Analyzer interface with ImPlot
• ImHex now uses the system file dialog instead of a custom one to open files
• Improved colors used on the welcome screen
• Variables placed out of bounds are now discarded instead of causing a error
• Improved goto command to now respect base addresses

Bug fixes

• Fixed multiple severe memory leaks in the pattern language
• Fixed bookmark names and comments refusing to be changed
• Fixed color attribute requiring a 0x prefix to understand the value
• Fixed region selection event only selecting first byte
• Fixed eval_depth default value being way too low
• Fixed ternary expressions in the pattern language not working everywhere
• Fixed bookmark name and comment not being loaded properly from a project file
• Fixed binary value in base converter being shifted by one
• Fixed pointers in the pattern language easily crashing ImHex
• Fixed MIME-based pattern loading popup being almost unusable. Thanks to @ThisALV for making me aware of this

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