[ImgBot] Optimize images

*Total -- 143.60kb -> 89.65kb (37.57%)

/Dashboard/assets/icons/png/512x512.png -- 27.73kb -> 14.53kb (47.59%)
/Dashboard/assets/icons/png/1024x1024.png -- 58.76kb -> 31.00kb (47.24%)
/Dashboard/assets/icons/png/256x256.png -- 12.19kb -> 6.75kb (44.64%)
/Dashboard/assets/icons/png/128x128.png -- 4.68kb -> 3.32kb (29.06%)
/Dashboard/assets/icons/Icon.png -- 36.93kb -> 31.03kb (15.98%)
/Dashboard/assets/knob/Knob.svg -- 1.56kb -> 1.34kb (13.75%)
/Dashboard/assets/icons/png/64x64.png -- 1.75kb -> 1.67kb (4.74%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Dashboard/assets/knob/Knob.svg

@@ -1,38 +1 @@
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