Save current document settings as default settings

[hius07]

One of the most frequent questions asked by the new users is why my current settings are not applied to all books.
After they understand why, they must go through all the settings once more. This will help.

---

This change is 

[NiLuJe]

Do we have a way to pull those from the doc's configurable instance automatically? (with a "blacklist" like the reset option does, if necessary).

(This would mean less maintenance burden in case they ever change, and would handle the kopt/cre swap automagically).

[hius07]

I'll think of this

[poire-z]

This big listing of saveSetting does not really have place in a ReaderMenu.
I would put it in a new module that you would just use here - with resetDocumentSettings() which also has quite nothing to do with FilemanagerUtil :)
require("apps/filemanager/filemanagerutil").resetDocumentSettings(current_file)

[hius07]

This big listing of saveSetting does not really have place in a ReaderMenu.

It is rather short now, maybe keep it here?

[poire-z]

As you prefer.
Still, resetDocumentSettings() which is only used in ReaderMenu may probably be moved where the new saveDocumentSettingsAsDefault() is.

[hius07]

resetDocumentSettings() is near purgeSettings(), they have similar structures and goals.
I agree that ReaderMenu should be just a frame but cannot find better place for these "doc settings" functions.

[hius07]

Just for reference: configurable structure.

CRE

{
    b_page_margin = 5,
    block_rendering_mode = 3,
    cjk_width_scaling = 100,
    embedded_css = 1,
    embedded_fonts = 1,
    font_base_weight = 0,
    font_gamma = 26,
    font_hinting = 0,
    font_kerning = 3,
    font_size = 23,
    h_page_margins = {
        30,
        30,
    },
    line_spacing = 130,
    nightmode_images = 1,
    render_dpi = 96,
    rotation_mode = 0,
    smooth_scaling = 0,
    status_line = 1,
    sync_t_b_page_margins = 0,
    t_page_margin = 10,
    view_mode = 0,
    visible_pages = 1,
    word_expansion = 0,
    word_spacing = {
        75,
        50,
    },
}

PDF

{
    auto_straighten = 0,
    contrast = 1,
    defect_size = 1,
    detect_indent = 1,
    doc_language = "eng",
    font_fine_tune = 0.050000000000000003,
    font_size = 1,
    forced_ocr = 0,
    full_screen = 1,
    hw_dithering = 0,
    justification = 3,
    line_spacing = 1.2,
    max_columns = 3,
    page_gap_height = 8,
    page_margin = 0.10000000000000001,
    page_opt = 0,
    page_scroll = 0,
    quality = 1,
    rotation_mode = 0,
    sw_dithering = 0,
    text_wrap = 0,
    trim_page = 1,
    word_spacing = -0.20000000000000001,
    writing_direction = 0,
    zoom_direction = 7,
    zoom_factor = 1.5,
    zoom_mode_genus = 4,
    zoom_mode_type = 1,
    zoom_overlap_h = 36,
    zoom_overlap_v = 36,
    zoom_range_number = 2,
}