Custom translation, custom key bindings, improved control

[list] [*] Custom translation via "translation.csv". There is a "translation" folder in the user directory. Save a "translation.csv" there. Feel free to check my discord for more details: https://discord.gg/JTBS2xWedR [*] Custom key bindings: You can now change the input for the keyboard keys in the settings dialog [*] Switching through the clicked objects via Ctrl/Command and left-click now possible [*] "Create Deco Objects" button for forest added. Trees now vary slightly in height [*] Rotation speed + scale speed + height change by key of objects/deco images faster when shift is pressed [*] The movement speed of the camera with pressed mouse wheel or keys now depends on the zoom level [*] The movement speed of the camera with keys can be accelerated by holding down the Shift key [*] Zoom speed with mouse wheel can be accelerated by holding down the Shift key [*] Export: Added warning when setting the image resolution for export: Maximum per dimension: 16000 pixels. Recommended total number of pixels of the image: 100000k pixels [*] Bug fixes and minor things [/list]