Add sources folder for icons
Add icons source file
Add svg filenames normalization
Add some icons to src
Add experimental icon
Add defs to sprites
Add paperclip icon to src
Add share icon google style
Minor
Add share icon apple style
Update icons preview files
Add bell and external link icons
Add refresh icon
Add undo and redo icons
Add loaders
Add cart and fix bell
Revert "Add defs to sprites"

This reverts commit b06f44bf6837c11d8aec16f2247c33da4bd1c16f.
Add sprite optimization