The Squared² update [Part 2] - 1.4.2

What changed?

• Squared can now export generated images in a .squ file format which just contains the object data
• Squared split into 3 tabs: Generate, Image, Video
• The image tab can load .squ files and re-render them to a PNG of any size (since .squ is a vector file format)
• The video tab can combine multiple .squ files into a single .sqv file and play existing .sqv files as videos
• Added the ability to open levels through the level editor
• The new file tab can either create a new level (restart ZLE), open an existing level, save the level, or exit - moved the save and exit buttons to the file menu
• Added right-click on files to open file properties
• Added autocomplete to "input file" in Squared
• Added a GL info button that prints out all available OpenGL extensions, the version, vendor, and some other things
• Added a new "midnight" theme
• Optimized particle random function - increasing performance by about 5%
• Fixed a Linux-only bug that crashes the editor when selecting particles (Linux seems to be really sensitive to some things compared to Windows lol)
• Fixed a Windows-only bug that crashes the editor when creating levels (on the other hand, Windows seems to dislike null bytes more than Linux lol)
• Fixed an issue with font sizes being stretched after a restart
• Fixed file images being partially inside the files tab when setting a font size lower than 16
• Fixed the key Q not deselecting the move/rotate/scale icons
• Fixed a Linux nullptr dereference bug with particle systems 
• Fixed the particle texture not being reapplied after changing the max particle count
• Fixed the remove button in particle events not working