Material preview: now materials are loaded by reading .vmt files.
(Making a copy of a material that was already loaded by the map did not work.)

Added a material browser for info_overlay & infodecal entities

Added entity counts in "Remove entities by class", except for internal entities

Fixed error with empty entity keyvalues set

GUI: added tooltips & a status bar

• Fixed conversion from float32 to text (applied to Vector & Angle): always decimal notation & guaranteed precision (always enough digits after decimal point)
  
• Due to new float32 to text conversion, int32s are now formatted explicitly.

Avoid precision loss caused by util.KeyValuesToTable() when importing info_overlays & prop_statics as text

• info_overlays can be exported and imported as text.
  
• Redesigned float32 encoding for better accuracy and simplicity (some values still get lower than expected when decoding re-encoded float32s)
  
• Slightly improved prop_statics decoding
  

Added French GUI translation

Added func_useableladder to the Spawn() blacklist: not working if Spawn()ed again