Update BeamExplorer.htm (static page for historical blocks, SVG icons…

…, column selection) (#1989)

* added Rules::IsPastFork()

* Rules::IsPastFork_() (template version)

* wallet: making sure voucher response is received after wallet restart

* wallet: misc

* wallet: added "widget" handler

* build fix

* wallet/cli: shutdown fix

* bvm: Load/SaveVar for app shader

* wallet: implemented Load/SaveVar for app shader via WalletDB

* bvm: misc

* wallet: supporting multiple widgets

* wallet: widgets fix

* explorer: amount with + sign where applicable.
htm: different clr for signed/unsigned positive.

* explorer: flexible column selection in "hdrs" query

* explorer: added dh arg to hdrs query

* Update BeamExplorer.htm

* Eye symbols toggle text both ways

* Correction of Cell Amounts

* adjust vocabulary

* Correct an overflow display of eye symbols

* Cleaning

* Simplify some CSS

* Use SVG icons in banner

* Replace all eye symbols with SVG

* Replace next/prev symbols with SVG

SVG icons are defined as templates and then called everytime they are needed.

* Rename v0.4 into v0.5

* small corrections

* Scale SVG icons with text

* Better CSS for hover on eye icons

* Add wrappers and CSS to keep footer at the bottom

* Highlight rows on hover

* Add static page of historical blocks

Add a static page of interesting historical blocks and blockchain events.

* small adjustments

* Update for column selection of block headers

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Co-authored-by: valdok <valdo@beam-mw.com>