[SYSSETUP] Tweak IDD_COMPUTERPAGE positioning (#5198)

[SYSSETUP] Tweak IDD_COMPUTERPAGE positioning (#5198)

- make all 3 input boxes IDC_COMPUTERNAME, IDC_ADMINPASSWORD1, IDC_ADMINPASSWORD2 on this page the same length for all languages and start and end at same x-coord, e.g. sk-SK.rc, uk-UA.rc
- let the input boxes end at the same x as the edits in the previous dlg IDD_OWNERPAGE
- respect the right margin of the dialog with all controls for all languages, makes it look more harmonic to previous and next dlg, see video:
- make the input fields as wide as possible, but not wider, depending on what the language allowed I used width of 139, 148, 163 (163 is same as the EDITs in IDD_OWNERPAGE used)
- fix too small x offset for some controls in some languages like bg-BG.rc, that looked very off
- in zh-CN.rc fix the maximum allowed length for computer name from 63 to 15
- ja-JP.rc 15 is max chars for computer name, not 63
- Fix it-IT text truncation "Organizzazione" in IDD_OWNERPAGE
- pl-PL.rc Steal some wisdom from 0.4.9 to better stick with en-US.rc dimensions.