Selectable icon size on button pages

Solves #960

dev/manuals_screenshots.md

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+# Nextion instructions used for screenshots
+
+Please select "Instruction codes: utf-8" in the Nextion simulator
+
+### Boot page
+```
+page boot
+ip_addr.txt="192.168.0.33"
+baud_rate.txt="115200 bps"
+framework.txt="arduino"
+esph_version.txt=tft_version.txt
+bluep_version.txt=tft_version.txt
+vis bt_reboot,1
+```
+
+![Boot EU](pics/eu_boot.png)
+<br>
+![Boot US](pics/us_boot.png)
+
+### Home page
+#### EU version
+```
+page home
+date.txt="Sunday, 29/11"
+outdoor_temp.txt="8.9°"
+time.txt="12:34"
+vis wifi_icon,1
+wifi_icon.txt=""
+weather.pic=11
+left_bt_text.txt="Ceiling lights"
+left_bt_pic.pic=32
+icon_top_01.txt=""
+right_bt_text.txt="Desk lights"
+icon_top_03.txt=""
+icon_top_03.pco=64164
+icon_top_06.txt=""
+icon_top_08.txt="侀"
+current_temp.txt="21.6 °C"
+indoortempicon.txt=""
+value01_state.txt="47%"
+value01_icon.txt=""
+bt_notific.txt=""
+vis bt_notific,1
+bt_qrcode.txt=""
+vis bt_qrcode,1
+bt_entities.txt=""
+vis bt_entities,1
+bt_alarm.txt=""
+bt_alarm.pco=19818
+vis bt_alarm,1
+button01.txt=""
+button02.txt=""
+button03.txt=""
+value03_state.txt="715 W"
+value03_icon.txt=""
+```
+![Home EU](pics/eu_home.png)
+
+#### US version
+```
+page home
+meridiem.txt="PM"
+date.txt="Sunday, 11/29"
+outdoor_temp.txt="48°"
+time.txt="12:34"
+vis wifi_icon,1
+wifi_icon.txt=""
+weather.pic=11
+left_bt_text.txt="Ceiling lights"
+left_bt_pic.pic=32
+icon_top_01.txt=""
+right_bt_text.txt="Desk lights"
+icon_top_03.txt=""
+icon_top_03.pco=64164
+icon_top_06.txt=""
+icon_top_08.txt="侀"
+current_temp.txt="71 °F"
+indoortempicon.txt=""
+value01_state.txt="47%"
+value01_icon.txt=""
+bt_notific.txt=""
+vis bt_notific,1
+bt_qrcode.txt=""
+vis bt_qrcode,1
+bt_entities.txt=""
+vis bt_entities,1
+bt_alarm.txt=""
+bt_alarm.pco=19818
+vis bt_alarm,1
+button01.txt=""
+button02.txt=""
+button03.txt=""
+value03_state.txt="715 W"
+value03_icon.txt=""
+```
+![Home US](pics/us_home.png)
+
+### Settings page
+```
+page settings
+```
+
+![Settings EU](pics/eu_settings.png)
+![Settings US](pics/us_settings.png)
+
+
+### Buttons pages (DRAFT)
+```
+api=1
+page buttonpage01
+page_label.txt="Bedroom"
+vis 255,1
+button01pic.picc=47
+button01text.picc=47
+button01icon.picc=47
+button01bri.picc=47
+button01text.txt="Ceiling\rlights"
+button01text.pco=10597
+button01icon.txt=""
+button01icon.pco=64704
+button01icon.font=10
+button01bri.txt="100%"
+button01bri.pco=10597
+button02pic.picc=46
+button02text.picc=46
+button02icon.picc=46
+button02bri.picc=46
+button05pic.picc=47
+button05text.picc=47
+button05icon.picc=47
+button05bri.picc=47
+button05text.txt="Windows\rlights"
+button05text.pco=10597
+button05icon.txt=""
+button05icon.pco=64704
+button05icon.font=8
+button05bri.txt="100%"
+button05bri.pco=10597
+button06pic.picc=46
+button06text.picc=46
+button06icon.picc=46
+button06bri.picc=46
+```

dev/ui/us_land/instructions.md

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+# Creating `nspanel_us_land.HMI` from `nspanel_eu.HMI`:
+
+## Program.s:
+Change to `display_mode=3`
+
+## Page `home`:
+1. Change left_bt_pic (x,y,w,h) from ( 47,307,120,3) to (467,173,3,120)
+2. Change right_bt_pic(x,y,w,h) from (288,307,120,3) to (467, 27,3,120)
+3. Rotate pictures 30 & 31 by 90degrees - You will find the rotated pics under pics folder where this instruction file is.