[Vrul]

For the item border code you need to make a similar change to the UpdateItemQualityBorders function:

local function UpdateItemQualityBorders(frame, _, unit)
    if frame.unit ~= unit then return end
    local border = borders[frame]
    for id = 1, #slots do
        local link = GetInventoryItemLink(unit, id)                                         -- GetInventoryItemQuality doesn't work for InspectFrame
        if link then
            local color = qualityColor[link:match("|[Cc][Ff][Ff](%x%x%x%x%x%x)")]
            border[id]:SetVertexColor(color[1], color[2], color[3])
            border[id]:Show()
        else
            border[id]:Hide()
        end
    end
end

For the notes code the OnAccept function should be:

OnAccept = function(self)
    addNoteFromPopup(_G[self:GetName() .. "EditBox"]:GetText())
end,

Also, both EditBox functions have "_G[self:GetParent():GetName() .. 'EditBox']:GetText()" which is the same as "self:GetText()" so you may want to change that. However, I think that whole section of code could use some cleaning up:

StaticPopupDialogs["GTipNotes"] = {
    button1 = SET,
    button2 = CANCEL,
    hasEditBox = true,
    hideOnEscape = true,
    text = POPUP_TEXT,
    timeout = 0,
    whileDead = true,
    EditBoxOnEnterPressed = function(self, data)
        local note = self:GetText():trim()
        if note == "" then
            note = nil
        end
        GTipNotesDB[data] = note
        self:GetParent():Hide()
    end,
    EditBoxOnEscapePressed = function(self)
        self:GetParent():Hide()
    end,
    OnAccept = function(self, data)
        local note = _G[self:GetName() .. 'EditBox']:GetText():trim()
        if note == "" then
            note = nil
        end
        GTipNotesDB[data] = note
    end
}
 
SlashCmdList["GTIPNOTES_SHORTHAND"] = function(note)
    if UnitExists('target') then
        local name = UnitName('target')
        note = note:trim()
        if note == "" then
            note = GTipNotesDB[name]
        end
        StaticPopup_Show("GTipNotes", name, nil, name)
        if note then
            name = StaticPopup_Visible("GTipNotes")
            if name then
                _G[name .. 'EditBox']:SetText(note)
            end
        end
    else
        print(TARGET_ERROR)
    end
end