[WebUI] 2.2.6 Update

[blessedcoolant]

New:

• [x] Add app version number to the WebUI

Bug Fixes:

• [x] Optimize model searching
• [x] Fix to image degradation on subsequent merges of the canvas.
• [x] Fix a pixel of transparency being left over when filling a box with color
• [x] Fix incorrect font on the Model Manager UI.
• [x] Fix Italian localization not working for tooltips.