代码优化，结构调整，进度50%

src/icons/svg/password.svg

@@ -1 +1 @@
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+<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1561614515233" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="3833" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="200"><defs><style type="text/css"></style></defs><path d="M807.049 391.258c0.946-9.62 1.45-19.37 1.45-29.239 0-163.7-132.706-296.406-296.406-296.406S215.687 198.318 215.687 362.02c0 9.802 0.498 19.486 1.432 29.043-43.925 18.95-74.675 62.638-74.675 113.516v330.363c0 68.25 55.328 123.58 123.58 123.58h491.672c68.25 0 123.578-55.328 123.578-123.58V504.578c0-50.704-30.54-94.267-74.225-113.32zM510.917 165.905c109.134 0 197.604 88.47 197.604 197.603 0 5.895-0.275 11.726-0.782 17.49H314.094a200.097 200.097 0 0 1-0.782-17.49c0.002-109.132 88.472-197.603 197.605-197.603z" p-id="3834" fill="#8a8a8a"></path></svg>